omeprazole/amoxicillin/clarithromycin (Rx)

Brand and Other Names:Omeclamox-Pak
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Dosing & Uses

AdultPediatric

Dosing Forms & Strengths

omeprazole/amoxicillin/clarithromycin

capsule/capsule/tablet prepack

  • 20mg/500mg/500mg
  • Amoxicillin dose consists of two 500mg capsules (ie, 1000mg/dose)

Duodenal Ulcer

Indicated for eradication of H pylori to reduce risk of duodenal ulcer recurrence

Omeprazole 20 mg, amoxicillin 1000 mg, and clarithromycin 500 mg coadministered PO BID (morning and evening) for 10 days

Renal & Hepatic Impairment

Renal impairment: No dose adjustment necessary

Hepatic impairment: Avoid use

Safety and efficacy not established

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Interactions

Interaction Checker

and omeprazole/amoxicillin/clarithromycin

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            Contraindicated (33)

            • alfuzosin

              alfuzosin and clarithromycin both increase QTc interval. Contraindicated.

            • chloroquine

              chloroquine increases toxicity of clarithromycin by QTc interval. Contraindicated.

            • cisapride

              clarithromycin and cisapride both increase QTc interval. Contraindicated.

            • clofazimine

              clarithromycin and clofazimine both increase QTc interval. Contraindicated.

            • cobimetinib

              clarithromycin will increase the level or effect of cobimetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Avoid coadministration with strong CYP3A4 inhibitors with (increases cobimetinib systemic exposure by 6.7-fold).

            • conivaptan

              clarithromycin will increase the level or effect of conivaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of conivaptan with strong CYP3A4 inhibitors is contraindicated.

            • dihydroergotamine

              clarithromycin increases toxicity of dihydroergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration may result in vasospasm and ischemia of the extremities and other tissues including the CNS.

            • dihydroergotamine intranasal

              clarithromycin increases toxicity of dihydroergotamine intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration may result in vasospasm and ischemia of the extremities and other tissues including the CNS.

            • dofetilide

              dofetilide increases toxicity of clarithromycin by QTc interval. Contraindicated.

            • eliglustat

              clarithromycin will increase the level or effect of eliglustat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Strong CYP3A4 inhibitors are contraindicated with eliglustat poor or intermediate metabolizers; reduce eliglustat dose from 84 mg BID to 84 mg once daily in extensive metabolizers; eliglustat is contraindiated if strong or moderate CYP2D6 inhibitors are given concomitantly with strong or moderate CYP3A inhibitors

            • ergoloid mesylates

              clarithromycin will increase the level or effect of ergoloid mesylates by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.

            • ergonovine

              clarithromycin will increase the level or effect of ergonovine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.

            • ergotamine

              clarithromycin increases toxicity of ergotamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration may result in vasospasm and ischemia of the extremities and other tissues including the CNS.

            • erlotinib

              omeprazole decreases levels of erlotinib by Other (see comment). Contraindicated. Comment: Concomitant use of proton pump inhibitors with erlotinib should be avoided if possible. Drugs that alter pH of upper GI tract may alter the solubility of erlotinib and reduce its bioavailability. .

            • finerenone

              clarithromycin will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.

            • flibanserin

              clarithromycin will increase the level or effect of flibanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of flibanserin with moderate or strong CYP3A4 inhibitors is contraindicated. Severe hypotension or syncope can occur.

            • ibutilide

              clarithromycin and ibutilide both increase QTc interval. Contraindicated.

            • indapamide

              clarithromycin and indapamide both increase QTc interval. Contraindicated.

            • ivabradine

              clarithromycin will increase the level or effect of ivabradine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of ivabradine with strong CYP3A4 inhibitors is contraindicated

            • lomitapide

              clarithromycin increases levels of lomitapide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Increases lomitapide levels several folds.

            • lonafarnib

              clarithromycin will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Lonafarnib is a sensitive CYP3A4 substrate. Coadministration with strong or moderate CYP3A4 inhibitors is contraindicated.

            • lovastatin

              clarithromycin will increase the level or effect of lovastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Strong CYP3A4 inhibitors increase systemic statin exposure and risk of myopathy, including rhabdomyolysis

              clarithromycin will increase the level or effect of lovastatin by P-glycoprotein (MDR1) efflux transporter. Contraindicated.

            • lurasidone

              clarithromycin increases levels of lurasidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of lurasidone and strong CYP3A4 inhibitors is contraindicated.

            • methylergonovine

              clarithromycin will increase the level or effect of methylergonovine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.

            • naloxegol

              clarithromycin will increase the level or effect of naloxegol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Coadministration of naloxegol with strong CYP3A4 inhibitors can significantly increase naloxegol systemic exposure which may precipitate opioid withdrawal symptoms

            • nelfinavir

              omeprazole decreases levels of nelfinavir by unspecified interaction mechanism. Contraindicated. Coadministration may lead to loss of nelfinavir virologic response and development of resistance; mechanism may be CYP2C19 inhibition of nelfinavir conversion to active M8 metabolite, and also PPIs decreasing gastric pH resulting in decreased nelfinavir absorption.

            • pentamidine

              clarithromycin and pentamidine both increase QTc interval. Contraindicated.

            • pimozide

              clarithromycin and pimozide both increase QTc interval. Contraindicated.

              clarithromycin increases levels of pimozide by decreasing metabolism. Contraindicated. Risk of QT interval prolongation.

            • quinidine

              quinidine and clarithromycin both increase QTc interval. Contraindicated.

            • regorafenib

              clarithromycin, regorafenib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Strong CYP3A4 inhibitors increase regorafenib levels and decrease exposure of the active metabolites M-2 and M-5.

            • rifabutin

              clarithromycin increases levels of rifabutin by decreasing metabolism. Contraindicated.

            • rilpivirine

              omeprazole decreases levels of rilpivirine by increasing gastric pH. Applies only to oral form of both agents. Contraindicated. Concurrent use may cause treatment failure and/or the development of rilpivirine or NNRTI resistance owing to decreased levels.

            • saquinavir

              clarithromycin and saquinavir both increase QTc interval. Contraindicated.

            Serious - Use Alternative (313)

            • BCG vaccine live

              amoxicillin decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Wait until Abx Tx complete to administer live bacterial vaccine.

            • abametapir

              abametapir will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. For 2 weeks after abametapir application, avoid taking drugs that are CYP3A4 substrates. If not feasible, avoid use of abametapir.

              abametapir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. For 2 weeks after abametapir application, avoid taking drugs that are CYP3A4 substrates. If not feasible, avoid use of abametapir.

            • acalabrutinib

              omeprazole decreases levels of acalabrutinib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Acalabrutinib solubility decreases with increasing gastric pH. Due to the long-lasting effect of PPIs, separation of doses may not eliminate the interaction.

              clarithromycin will increase the level or effect of acalabrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of acalabrutinib with strong CYP3A inhibitors. If a strong CYP3A inhibitor must be used short-term (eg, up to 7 days), temporarily interrupt treatment with acalabrutinib.

            • ado-trastuzumab emtansine

              clarithromycin increases levels of ado-trastuzumab emtansine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. DM1, the cytotoxic component, is metabolized mainly by CYP3A4; strong CYP3A4 inhibitors may increase DM1 exposure and toxicity.

            • apalutamide

              apalutamide will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Coadministration of apalutamide, a strong CYP2C19 inducer, with drugs that are CYP2C19 substrates can result in lower exposure to these medications. Avoid or substitute another drug for these medications when possible. Evaluate for loss of therapeutic effect if medication must be coadministered.

              apalutamide will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of apalutamide, a strong CYP3A4 inducer, with drugs that are CYP3A4 substrates can result in lower exposure to these medications. Avoid or substitute another drug for these medications when possible. Evaluate for loss of therapeutic effect if medication must be coadministered. Adjust dose according to prescribing information if needed.

            • afatinib

              clarithromycin increases levels of afatinib by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Reduce afatinib daily dose by 10 mg if not tolerated when coadministered with P-gp inhibitors.

            • alitretinoin

              clarithromycin will increase the level or effect of alitretinoin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • almotriptan

              clarithromycin will increase the level or effect of almotriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • alprazolam

              clarithromycin will increase the level or effect of alprazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • amiodarone

              clarithromycin will increase the level or effect of amiodarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. May result in prolongation of QT interval

              amiodarone and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • amitriptyline

              clarithromycin will increase the level or effect of amitriptyline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              amitriptyline and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • amoxapine

              amoxapine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • anagrelide

              clarithromycin and anagrelide both increase QTc interval. Avoid or Use Alternate Drug.

            • antithrombin alfa

              clarithromycin increases effects of antithrombin alfa by decreasing metabolism. Avoid or Use Alternate Drug.

            • antithrombin III

              clarithromycin increases effects of antithrombin III by decreasing metabolism. Avoid or Use Alternate Drug.

            • apalutamide

              apalutamide will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of apalutamide, a strong CYP3A4 inducer, with drugs that are CYP3A4 substrates can result in lower exposure to these medications. Avoid or substitute another drug for these medications when possible. Evaluate for loss of therapeutic effect if medication must be coadministered. Adjust dose according to prescribing information if needed.

            • apomorphine

              apomorphine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • aprepitant

              clarithromycin will increase the level or effect of aprepitant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • argatroban

              clarithromycin increases effects of argatroban by decreasing metabolism. Avoid or Use Alternate Drug.

            • aripiprazole

              clarithromycin will increase the level or effect of aripiprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              aripiprazole and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • arsenic trioxide

              arsenic trioxide and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • artemether

              artemether and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • artemether/lumefantrine

              clarithromycin will increase the level or effect of artemether/lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and artemether/lumefantrine both increase QTc interval. Avoid or Use Alternate Drug.

            • asenapine

              clarithromycin and asenapine both increase QTc interval. Avoid or Use Alternate Drug.

            • atazanavir

              omeprazole will decrease the level or effect of atazanavir by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Atazanavir solubility decreases as pH increases. Substantially reduced plasma concentrations of atazanavir are expected if PPIs are coadministered. PPI dose should not exceed a dose comparable to omeprazole 20 mg and must be taken ~12 h before atazanavir/ritonavir in treatment naive-patients. PPIs are not recommended in treatment-experienced taking atazanavir.

            • atomoxetine

              atomoxetine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • atorvastatin

              clarithromycin will increase the level or effect of atorvastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Do not exceed atorvastatin dose of 20 mg/day when coadministered with clarithromycin

              clarithromycin will increase the level or effect of atorvastatin by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Do not exceed atorvastatin dose of 20 mg/day when coadministered with clarithromycin

              clarithromycin increases toxicity of atorvastatin by Other (see comment). Avoid or Use Alternate Drug. Comment: OATP1B1 inhibitors may increase risk of myopathy.

            • avanafil

              clarithromycin will increase the level or effect of avanafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. CYP3A4 inhibitors may reduce avanafil clearance increasing systemic exposure to avanafil; significantly increased levels may result in significant adverse events including severe hypotension, syncope, visual changes, and priapism. Coadministration with strong CYP3A4 is contraindicated.

            • avapritinib

              clarithromycin will increase the level or effect of avapritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of avapritinib with strong CYP3A4 inhibitors.

            • axitinib

              clarithromycin increases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If unable to avoid coadministration with strong CYP3A4 inhibitors, reduce axitinib dose by 50%.

            • bazedoxifene/conjugated estrogens

              clarithromycin will increase the level or effect of bazedoxifene/conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • BCG vaccine live

              clarithromycin decreases effects of BCG vaccine live by pharmacodynamic antagonism. Contraindicated. Wait until Abx Tx complete to administer live bacterial vaccine.

            • bedaquiline

              clarithromycin will increase the level or effect of bedaquiline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of bedaquiline with strong CYP3A4 inhibitors for >14 consecutive days, unless the benefit of treatment outweighs the risk

            • bemiparin

              clarithromycin increases effects of bemiparin by decreasing metabolism. Avoid or Use Alternate Drug.

            • bivalirudin

              clarithromycin increases effects of bivalirudin by decreasing metabolism. Avoid or Use Alternate Drug.

            • bosutinib

              clarithromycin increases levels of bosutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Strong CYP3A4 inhibitors increases bosutinib plasma concentration ~5-fold.

              clarithromycin increases levels of bosutinib by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

            • brigatinib

              clarithromycin will increase the level or effect of brigatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A inhibitor cannot be avoided, reduce the brigatinib once daily dose by about 50% (ie, from 180 mg to 90 mg, or from 90 mg to 60 mg). After discontinuation of a strong CYP3A inhibitor, resume the brigatinib dose that was tolerated prior to initiating the strong CYP3A inhibitor.

            • bromocriptine

              clarithromycin will increase the level or effect of bromocriptine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • budesonide

              clarithromycin will increase the level or effect of budesonide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • buprenorphine

              clarithromycin will increase the level or effect of buprenorphine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and buprenorphine both increase QTc interval. Avoid or Use Alternate Drug.

            • buprenorphine transdermal

              clarithromycin will increase the level or effect of buprenorphine transdermal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • buspirone

              clarithromycin will increase the level or effect of buspirone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • cabazitaxel

              clarithromycin will increase the level or effect of cabazitaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of cabazitaxel with strong CYP3A4 inhibitors should be avoided.

            • cabergoline

              clarithromycin increases levels of cabergoline by decreasing metabolism. Contraindicated.

            • cabozantinib

              clarithromycin will increase the level or effect of cabozantinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of cabozantinib with strong CYP3A4 inhibitors. If a strong CYP3A4 inhibitor is required, decrease cabozantinib dose by 40 mg/day (Cometriq) or by 20 mg/day (Cabometyx). Resume previous dose 2-3 days after strong CYP3A4 inhibitor discontinued.

            • calcitriol

              clarithromycin will increase the level or effect of calcitriol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • carbamazepine

              clarithromycin will increase the level or effect of carbamazepine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Monitor plasma levels when used concomitantly

              carbamazepine will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug.

            • ceritinib

              ceritinib and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

              clarithromycin increases levels of ceritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid if possible; if concomitant use is unavoidable, reduce ceritinib dose by ~33%; after discontinuation of strong CYP3A inhibitor, resume at previous dose.

              omeprazole decreases effects of ceritinib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • chloroquine

              clarithromycin will increase the level or effect of chloroquine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • cholera vaccine

              amoxicillin, cholera vaccine. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid coadministration of cholera vaccine with systemic antibiotics since these agents may be active against the vaccine strain. Do not administer cholera vaccine to patients who have received oral or parenteral antibiotics within 14 days prior to vaccination.

            • cilostazol

              omeprazole will increase the level or effect of cilostazol by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug.

            • chlorpromazine

              chlorpromazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • cholera vaccine

              clarithromycin, cholera vaccine. pharmacodynamic antagonism. Avoid or Use Alternate Drug. Avoid coadministration of cholera vaccine with systemic antibiotics since these agents may be active against the vaccine strain. Do not administer cholera vaccine to patients who have received oral or parenteral antibiotics within 14 days prior to vaccination.

            • cilostazol

              clarithromycin will increase the level or effect of cilostazol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • cinacalcet

              clarithromycin will increase the level or effect of cinacalcet by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ciprofloxacin

              clarithromycin and ciprofloxacin both increase QTc interval. Avoid or Use Alternate Drug.

            • citalopram

              clarithromycin, citalopram. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. To monitor for the prolongation of QT/QTc and/or development of ventricular tachyarrhythmias the labeling recommends monitoring QT interval or ECG.

            • clobetasone

              clarithromycin will increase the level or effect of clobetasone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • clomipramine

              clarithromycin will increase the level or effect of clomipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clomipramine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • clopidogrel

              omeprazole decreases effects of clopidogrel by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Clopidogrel efficacy may be reduced by drugs that inhibit CYP2C19. Inhibition of platelet aggregation by clopidogrel is entirely due to an active metabolite. Clopidogrel is metabolized to this active metabolite in part by CYP2C19. .

              clarithromycin will decrease the level or effect of clopidogrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Inhibition of CYP3A4 will reduce clopidogrel bioactivation

            • clozapine

              clarithromycin will increase the level or effect of clozapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and clozapine both increase QTc interval. Avoid or Use Alternate Drug.

            • dacomitinib

              omeprazole will increase the level or effect of dacomitinib by unspecified interaction mechanism. Avoid or Use Alternate Drug. Concomitant use with a PPI decreases dacomitinib concentrations, which may reduce dacomitinib efficacy. Avoid use of PPIs with dacomitinib. As an alternative to PPIs, use locally-acting antacids or an H2-receptor antagonist. Administer at least 6 hours before or 10 hours after taking an H2-receptor antagonist.

            • cobicistat

              cobicistat, clarithromycin. Either increases levels of the other by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Consider alternative antibiotics with concomitant use of cobicistat coadministered with atazanavir or darunavir. .

              clarithromycin will increase the level or effect of cobicistat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • colchicine

              clarithromycin will increase the level or effect of colchicine by Other (see comment). Avoid or Use Alternate Drug. Colchicine is a P-gp and CYP3A4 substrate. Avoid use with drugs that are both P-gp and strong CYP3A4 inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with strong CYP3A4 inhibitors is contraindicated in patients with renal or hepatic impairment.

            • conjugated estrogens

              clarithromycin will increase the level or effect of conjugated estrogens by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • conjugated estrogens, vaginal

              clarithromycin will increase the level or effect of conjugated estrogens, vaginal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • copanlisib

              clarithromycin will increase the level or effect of copanlisib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use with strong CYP3A inhibitors cannot be avoided, reduce copanlisib dose to 45 mg.

            • cortisone

              clarithromycin will increase the level or effect of cortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • crizotinib

              clarithromycin and crizotinib both increase QTc interval. Avoid or Use Alternate Drug.

            • cyclosporine

              clarithromycin will increase the level or effect of cyclosporine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • dabrafenib

              clarithromycin increases levels of dabrafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • dalteparin

              clarithromycin increases effects of dalteparin by decreasing metabolism. Avoid or Use Alternate Drug.

            • darifenacin

              clarithromycin will increase the level or effect of darifenacin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • dasatinib

              clarithromycin will increase the level or effect of dasatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              omeprazole will decrease the level or effect of dasatinib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • degarelix

              clarithromycin and degarelix both increase QTc interval. Avoid or Use Alternate Drug.

            • demeclocycline

              demeclocycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • digoxin

              omeprazole will increase the level or effect of digoxin by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • desflurane

              desflurane and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • desipramine

              clarithromycin will increase the level or effect of desipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              desipramine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • deutetrabenazine

              clarithromycin and deutetrabenazine both increase QTc interval. Avoid or Use Alternate Drug.

            • dexamethasone

              clarithromycin will increase the level or effect of dexamethasone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • diazepam

              clarithromycin will increase the level or effect of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • digoxin

              clarithromycin will increase the level or effect of digoxin by altering intestinal flora. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • disopyramide

              clarithromycin and disopyramide both increase QTc interval. Avoid or Use Alternate Drug.

            • dofetilide

              clarithromycin and dofetilide both increase QTc interval. Avoid or Use Alternate Drug.

            • doxepin

              doxepin and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • doxycycline

              doxycycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • dronedarone

              clarithromycin will increase the level or effect of dronedarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and dronedarone both increase QTc interval. Avoid or Use Alternate Drug.

            • droperidol

              clarithromycin and droperidol both increase QTc interval. Avoid or Use Alternate Drug.

            • duloxetine

              omeprazole will decrease the level or effect of duloxetine by affecting hepatic enzyme CYP1A2 metabolism. Avoid or Use Alternate Drug.

            • edoxaban

              clarithromycin will increase the level or effect of edoxaban by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Dose adjustment may be required with strong P-gp inhibitors. DVT/PE treatment: Decrease dose to 30 mg PO once daily. NVAF: No dose reduction recommended

            • elbasvir/grazoprevir

              clarithromycin will increase the level or effect of elbasvir/grazoprevir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • eletriptan

              clarithromycin will increase the level or effect of eletriptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin increases levels of eletriptan by decreasing metabolism. Contraindicated. Separate by 72 hours.

            • eliglustat

              clarithromycin and eliglustat both increase QTc interval. Avoid or Use Alternate Drug.

            • eluxadoline

              clarithromycin increases levels of eluxadoline by decreasing metabolism. Avoid or Use Alternate Drug. Decrease eluxadoline dose to 75 mg PO BID if coadministered with OATP1B1 inhibitors. .

            • elvitegravir/cobicistat/emtricitabine/tenofovir DF

              clarithromycin will increase the level or effect of elvitegravir/cobicistat/emtricitabine/tenofovir DF by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • encorafenib

              clarithromycin will increase the level or effect of encorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If concomitant use of a strong CYP3A4 inhibitor is unavoidable, reduce encorafenib dose to one-third of the dose (eg, reduce from 450 mg/day to 150 mg/day). After discontinuing the inhibitor for 3-5 elimination half-lives, resume previous encorafenib dose.

              clarithromycin and encorafenib both increase QTc interval. Avoid or Use Alternate Drug.

            • enoxaparin

              clarithromycin increases effects of enoxaparin by decreasing metabolism. Avoid or Use Alternate Drug.

            • entrectinib

              clarithromycin and entrectinib both increase QTc interval. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of entrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of strong CYP3A4 inhibitors with entrectinib, a CYP3A4 substrate. If coadministration unavoidable, reduce entrectinib dose to 100 mg/day for patients aged 12 y or older with BSA >1.50m2. Resume previous entrectinib dose after discontinuing strong CYP3A inhibitor for 3-5 elimination half-lives.

            • enzalutamide

              enzalutamide will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of enzalutamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • epinephrine

              epinephrine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • eravacycline

              eravacycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • erdafitinib

              omeprazole will increase the level or effect of erdafitinib by affecting hepatic enzyme CYP2C9/10 metabolism. Avoid or Use Alternate Drug. If coadministration of a strong CYP2C9 inhibitors is unavoidable, closely monitor adverse reactions and modify dose of erdafitinib accordingly. If strong CYP2C9 inhibitor is discontinued, consider increasing erdafitinib dose in the absence of any drug-related toxicities.

            • epinephrine racemic

              epinephrine racemic and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • erdafitinib

              clarithromycin will increase the level or effect of erdafitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If unable to avoid coadministration with strong CYP3A4 inhibitors, monitor closely for adverse reactions and consider decreasing dose accordingly. If strong CYP3A4 inhibitor is discontinued, consider increasing erdafitinib dose in the absence of any drug-related toxicities.

            • ergoloid mesylates

              clarithromycin increases levels of ergoloid mesylates by decreasing metabolism. Contraindicated.

            • ergotamine

              clarithromycin increases levels of ergotamine by decreasing metabolism. Contraindicated.

            • eribulin

              eribulin and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug. Potential for enhanced QTc-prolonging effects; if concurrent use is necessary then ECG monitoring is recommended.

            • erlotinib

              clarithromycin will increase the level or effect of erlotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • erythromycin base

              clarithromycin and erythromycin base both increase QTc interval. Avoid or Use Alternate Drug.

            • erythromycin ethylsuccinate

              clarithromycin will increase the level or effect of erythromycin ethylsuccinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and erythromycin ethylsuccinate both increase QTc interval. Avoid or Use Alternate Drug.

            • erythromycin lactobionate

              clarithromycin will increase the level or effect of erythromycin lactobionate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and erythromycin lactobionate both increase QTc interval. Avoid or Use Alternate Drug.

            • erythromycin stearate

              clarithromycin will increase the level or effect of erythromycin stearate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and erythromycin stearate both increase QTc interval. Avoid or Use Alternate Drug.

            • escitalopram

              clarithromycin, escitalopram. Either increases toxicity of the other by QTc interval. Avoid or Use Alternate Drug. To monitor for the prolongation of QT/QTc and/or development of ventricular tachyarrhythmias the labeling recommends monitoring QT interval or ECG.

              escitalopram increases toxicity of clarithromycin by QTc interval. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of escitalopram by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • estradiol

              clarithromycin will increase the level or effect of estradiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • estrogens conjugated synthetic

              clarithromycin will increase the level or effect of estrogens conjugated synthetic by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • estropipate

              clarithromycin will increase the level or effect of estropipate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • etonogestrel

              clarithromycin will increase the level or effect of etonogestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • etravirine

              clarithromycin will increase the level or effect of etravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • everolimus

              clarithromycin will increase the level or effect of everolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of everolimus by P-glycoprotein (MDR1) efflux transporter. Contraindicated.

            • fedratinib

              omeprazole will increase the level or effect of fedratinib by Other (see comment). Avoid or Use Alternate Drug. Avoid coadministration of fedratinib (a CYP3A4 and CYP2C19 substrate) with dual CYP3A4 and CYP2C19 inhibitor. Effect of coadministration of a dual CYP3A4 and CYP2C19 inhibitor with fedratinib has not been studied.

              clarithromycin will increase the level or effect of fedratinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If unable to avoid fedratinib coadministration with strong CYP3A4 inhibitors, decrease fedratinib dose to 200 mg/day. If CYP3A4 inhibitor discontinued, increase fedratinib dose to 300 mg/day for 2 weeks, and then 400 mg/day thereafter as tolerated.

            • felbamate

              clarithromycin will increase the level or effect of felbamate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • fexinidazole

              fexinidazole will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Fexinidazole inhibits CYP3A4. Coadministration may increase risk for adverse effects of CYP3A4 substrates.

            • fentanyl

              clarithromycin will increase the level or effect of fentanyl by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of CYP3A4 inhibitors with fentanyl is necessary, monitor patients for respiratory depression and sedation at frequent intervals and consider fentanyl dose adjustments until stable drug effects are achieved.

            • fentanyl intranasal

              clarithromycin will increase the level or effect of fentanyl intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of CYP3A4 inhibitors with fentanyl is necessary, monitor patients for respiratory depression and sedation at frequent intervals and consider fentanyl dose adjustments until stable drug effects are achieved.

            • fentanyl transdermal

              clarithromycin will increase the level or effect of fentanyl transdermal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of CYP3A4 inhibitors with fentanyl is necessary, monitor patients for respiratory depression and sedation at frequent intervals and consider fentanyl dose adjustments until stable drug effects are achieved.

            • fentanyl transmucosal

              clarithromycin will increase the level or effect of fentanyl transmucosal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of CYP3A4 inhibitors with fentanyl is necessary, monitor patients for respiratory depression and sedation at frequent intervals and consider fentanyl dose adjustments until stable drug effects are achieved.

            • fesoterodine

              clarithromycin will increase the level or effect of fesoterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • fexinidazole

              clarithromycin will decrease the level or effect of fexinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If unable to avoid coadministration, monitor fexinidazole for decreased efficacy owing to decreased plasma concentrations of active M1 and M2 metabolites.

              fexinidazole and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of fexinidazole with drugs known to block potassium channels or prolong QT interval.

              fexinidazole will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Fexinidazole inhibits CYP3A4. Coadministration may increase risk for adverse effects of CYP3A4 substrates.

            • fluconazole

              clarithromycin and fluconazole both increase QTc interval. Avoid or Use Alternate Drug.

            • fludrocortisone

              clarithromycin will increase the level or effect of fludrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • fluphenazine

              fluphenazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • fluticasone intranasal

              clarithromycin will increase the level or effect of fluticasone intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Strong CYP3A4 inhibitors may increase systemic corticosteroid adverse effects; monitor for signs/symptoms of high corticosteroid concentrations including Cushing type signs/symptoms.

            • fluvastatin

              clarithromycin increases toxicity of fluvastatin by Other (see comment). Avoid or Use Alternate Drug. Comment: OATP1B1 inhibitors may increase risk of myopathy.

            • fluvoxamine

              fluvoxamine will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug.

            • fondaparinux

              clarithromycin increases effects of fondaparinux by decreasing metabolism. Avoid or Use Alternate Drug.

            • formoterol

              clarithromycin and formoterol both increase QTc interval. Avoid or Use Alternate Drug.

            • fosamprenavir

              clarithromycin will increase the level or effect of fosamprenavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • fostemsavir

              clarithromycin and fostemsavir both increase QTc interval. Avoid or Use Alternate Drug.

            • gadobenate

              clarithromycin and gadobenate both increase QTc interval. Contraindicated.

            • gemifloxacin

              clarithromycin and gemifloxacin both increase QTc interval. Avoid or Use Alternate Drug.

            • gilteritinib

              clarithromycin will increase the level or effect of gilteritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Consider alternatives to any strong CYP3A4 inhibitor when coadministered with gilteritinib. If such a combination cannot be avoided, closely monitor for gilteritinib-related adverse effects. Interrupt and reduce gilteritinib dosage in patients with serious or life-threatening toxicity.

            • glasdegib

              clarithromycin will increase the level or effect of glasdegib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Consider alternate therapies that are not strong CYP3A inhibitors or monitor for increased risk of adverse effects, including QTc interval prolongation.

              clarithromycin and glasdegib both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, monitor for increased risk of QTc interval prolongation.

            • granisetron

              clarithromycin and granisetron both increase QTc interval. Avoid or Use Alternate Drug.

            • haloperidol

              clarithromycin and haloperidol both increase QTc interval. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of haloperidol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • heparin

              clarithromycin increases effects of heparin by decreasing metabolism. Avoid or Use Alternate Drug.

            • hydrocortisone

              clarithromycin will increase the level or effect of hydrocortisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • hydroxychloroquine sulfate

              hydroxychloroquine sulfate and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • hydroxyprogesterone caproate

              clarithromycin will increase the level or effect of hydroxyprogesterone caproate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ibrutinib

              clarithromycin increases levels of ibrutinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of ibrutinib and strong CYP3A4 inhibitors. If a strong CYP3A4 inhibitor must be used short-term (eg, anti-infectives for =7 days), interrupt ibrutinib therapy until strong CYP3A4 inhibitor is discontinued.

            • idelalisib

              idelalisib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Idelalisib is a strong CYP3A inhibitor; avoid coadministration with sensitive CYP3A substrates

              idelalisib will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Idelalisib is a strong CYP3A inhibitor; avoid coadministration with sensitive CYP3A substrates

              clarithromycin will increase the level or effect of idelalisib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministered with strong CYP3A inhibitors, monitor for signs of idelalisib toxicity; follow recommendations for dosage modifications if adverse reactions occur

            • imipramine

              clarithromycin will increase the level or effect of imipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              imipramine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • indinavir

              omeprazole will decrease the level or effect of indinavir by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • indinavir

              clarithromycin will increase the level or effect of indinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • infigratinib

              clarithromycin will increase the level or effect of infigratinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              omeprazole will decrease the level or effect of infigratinib by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • inotuzumab

              inotuzumab and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug. If unable to avoid concomitant use, obtain ECGs and electrolytes before and after initiation of any drug known to prolong QTc, and periodically monitor as clinically indicated during treatment.

            • isoniazid

              isoniazid will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug.

            • irinotecan

              clarithromycin will increase the level or effect of irinotecan by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of irinotecan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • irinotecan liposomal

              clarithromycin will increase the level or effect of irinotecan liposomal by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of irinotecan liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. UGT1A1 inhibitors decrease irinotecan metabolism

            • isoflurane

              clarithromycin and isoflurane both increase QTc interval. Avoid or Use Alternate Drug.

            • isradipine

              clarithromycin and isradipine both increase QTc interval. Avoid or Use Alternate Drug.

            • itraconazole

              itraconazole will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              omeprazole will decrease the level or effect of itraconazole by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • ivosidenib

              clarithromycin will increase the level or effect of ivosidenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of strong CYP3A4 inhibitors with ivosidenib or replace with alternate therapies. If coadministration of a strong CYP3A4 inhibitor is unavoidable, reduce ivosidenib dose to 250 mg qDay. If the strong inhibitor is discontinued, increase ivosidenib dose (after at least 5 half-lives of the strong CYP3A4 inhibitor) to the recommended dose of 500 mg qDay. Monitor for increased risk of QTc interval prolongation.

              ivosidenib and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug. Avoid coadministration of QTc prolonging drugs with ivosidenib or replace with alternate therapies. If coadministration of a QTc prolonging drug is unavoidable, monitor for increased risk of QTc interval prolongation.

              ivosidenib will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of sensitive CYP3A4 substrates with ivosidenib or replace with alternative therapies. If coadministration is unavoidable, monitor patients for loss of therapeutic effect of these drugs.

              ivosidenib will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of sensitive CYP3A4 substrates with ivosidenib or replace with alternate therapies. If coadministration is unavoidable, monitor patients for loss of therapeutic effect of these drugs.

            • ixabepilone

              clarithromycin will increase the level or effect of ixabepilone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ketoconazole

              omeprazole will decrease the level or effect of ketoconazole by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • ketamine

              clarithromycin will increase the level or effect of ketamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ketoconazole

              clarithromycin and ketoconazole both increase QTc interval. Avoid or Use Alternate Drug.

              ketoconazole will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • lapatinib

              clarithromycin will increase the level or effect of lapatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • larotrectinib

              clarithromycin will increase the level or effect of larotrectinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of larotrectinib with strong CYP3A4 inhibitors is unavoidable, reduce larotrectinib dose by 50%. Resume prior larotrectinib dose once CYP3A4 inhibitor discontinued for 3-5 half-lives.

            • lefamulin

              clarithromycin will increase the level or effect of lefamulin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of lefamulin with strong CYP3A inhibitors.

              clarithromycin and lefamulin both increase QTc interval. Avoid or Use Alternate Drug.

            • lemborexant

              clarithromycin will increase the level or effect of lemborexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of lemborexant with moderate or strong CYP3A inhibitors.

            • lithium

              clarithromycin and lithium both increase QTc interval. Avoid or Use Alternate Drug.

            • lofepramine

              lofepramine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • lofexidine

              clarithromycin and lofexidine both increase QTc interval. Avoid or Use Alternate Drug.

            • lonafarnib

              omeprazole will increase the level or effect of lonafarnib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration of lonafarnib (a sensitive CYP3A substrate) with weak CYP3A inhibitors is unavoidable, reduce to, or continue lonafarnib at starting dose. Closely monitor for arrhythmias and events (eg, syncope, heart palpitations) since lonafarnib effect on QT interval is unknown.

              lonafarnib will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Avoid or Use Alternate Drug. Lonafarnib may increase the AUC and peak concentration of CYP2C19 substrates. If coadministration unavoidable, monitor for adverse reactions and reduce the CYP2C19 substrate dose in accordance with its approved product labeling.

            • loperamide

              clarithromycin and loperamide both increase QTc interval. Avoid or Use Alternate Drug.

            • lopinavir

              clarithromycin will increase the level or effect of lopinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              lopinavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and lopinavir both increase QTc interval. Avoid or Use Alternate Drug.

            • loratadine

              clarithromycin will increase the level or effect of loratadine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • lorlatinib

              clarithromycin will increase the level or effect of lorlatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministering lorlatinib with strong CYP3A inhibitors. If unavoidable, reduce lorlatinib dose by 25 mg/day. If strong CYP3A inhibitor discontinued, increase to previous lorlatinib (dose after 3 plasma half-lives of strong CYP3A inhibitor). See monograph for further details.

              lorlatinib will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • lumacaftor/ivacaftor

              lumacaftor/ivacaftor will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • lumefantrine

              clarithromycin will increase the level or effect of lumefantrine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and lumefantrine both increase QTc interval. Avoid or Use Alternate Drug.

            • lurbinectedin

              clarithromycin will increase the level or effect of lurbinectedin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • macimorelin

              macimorelin and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug. Macimorelin causes an increase of ~11 msec in the corrected QT interval. Avoid coadministration with drugs that prolong QT interval, which could increase risk for developing torsade de pointes-type ventricular tachycardia. Allow sufficient washout time of drugs that are known to prolong the QT interval before administering macimorelin.

            • macitentan

              clarithromycin will increase the level or effect of macitentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministering macitentan with strong CYP3A4 inhibitors

            • maprotiline

              maprotiline and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • mefloquine

              clarithromycin will increase the level or effect of mefloquine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Potential for increased toxicity. Avoid coadministration during and for 15 weeks after discontinuing mefloquine.

              clarithromycin and mefloquine both increase QTc interval. Avoid or Use Alternate Drug.

            • mesalamine

              omeprazole decreases effects of mesalamine by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Applies only to sustained release dosage form.

            • mestranol

              clarithromycin will increase the level or effect of mestranol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • methadone

              clarithromycin will increase the level or effect of methadone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • methylergonovine

              clarithromycin increases levels of methylergonovine by decreasing metabolism. Contraindicated.

            • methylprednisolone

              clarithromycin will increase the level or effect of methylprednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • midazolam

              clarithromycin will increase the level or effect of midazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • midazolam intranasal

              clarithromycin will increase the level or effect of midazolam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of strong CYP3A4 inhibitors with midazolam intranasal causes higher midazolam systemic exposure, which may prolong sedation.

            • midostaurin

              clarithromycin will increase the level or effect of midostaurin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with strong CYP3A4 inhibitors cannot be avoided, monitor midostaurin for increased risk of adverse reactions, especially during the first week of treatment.

              clarithromycin and midostaurin both increase QTc interval. Avoid or Use Alternate Drug.

            • mifepristone

              mifepristone will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and mifepristone both increase QTc interval. Avoid or Use Alternate Drug.

            • minocycline

              minocycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • mirtazapine

              clarithromycin will increase the level or effect of mirtazapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and mirtazapine both increase QTc interval. Avoid or Use Alternate Drug.

            • mobocertinib

              clarithromycin will increase the level or effect of mobocertinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              mobocertinib and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug. If coadministration unavoidable, reduce mobocertinib dose and monitor QTc interval more frequently.

            • modafinil

              clarithromycin will increase the level or effect of modafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • moxifloxacin

              clarithromycin and moxifloxacin both increase QTc interval. Avoid or Use Alternate Drug.

            • mycophenolate

              amoxicillin will decrease the level or effect of mycophenolate by Other (see comment). Avoid or Use Alternate Drug. Effect may be due to impairment of enterohepatic recirculation

            • nefazodone

              nefazodone will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of nefazodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • nelfinavir

              clarithromycin will increase the level or effect of nelfinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • neratinib

              omeprazole will decrease the level or effect of neratinib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of neratinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of neratinib with strong/moderate CYP3A4 inhibitors.

            • nevirapine

              clarithromycin will increase the level or effect of nevirapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • nilotinib

              omeprazole will decrease the level or effect of nilotinib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Nilotinib has a pH-dependent solubility and solubility is decreased at higher pH; separating doses may not eliminate this effect because of PPI extended duration of action

            • nilotinib

              clarithromycin will increase the level or effect of nilotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and nilotinib both increase QTc interval. Avoid or Use Alternate Drug.

            • nisoldipine

              omeprazole will increase the level or effect of nisoldipine by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • nortriptyline

              nortriptyline and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • octreotide

              clarithromycin and octreotide both increase QTc interval. Avoid or Use Alternate Drug.

            • octreotide (Antidote)

              clarithromycin and octreotide (Antidote) both increase QTc interval. Avoid or Use Alternate Drug.

            • olanzapine

              clarithromycin and olanzapine both increase QTc interval. Avoid or Use Alternate Drug. Limited data, including some case reports, suggest that olanzapine may be associated with a significant prolongation of the QTc interval in rare instances

            • olaparib

              clarithromycin will increase the level or effect of olaparib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with strong CYP3A inhibitors cannot be avoided, reduce olaparib dose to 150 mg (capsule) or 100 mg (tablet) PO BID. Do not substitute tablets with capsules.

            • omadacycline

              omadacycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • ombitasvir/paritaprevir/ritonavir

              clarithromycin will increase the level or effect of ombitasvir/paritaprevir/ritonavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ombitasvir/paritaprevir/ritonavir & dasabuvir

              clarithromycin will increase the level or effect of ombitasvir/paritaprevir/ritonavir & dasabuvir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ondansetron

              clarithromycin and ondansetron both increase QTc interval. Avoid or Use Alternate Drug. Avoid with congenital long QT syndrome; ECG monitoring recommended with concomitant medications that prolong QT interval, electrolyte abnormalities, CHF, or bradyarrhythmias. Potential for increased ondansetron levels.

              clarithromycin will increase the level or effect of ondansetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • osimertinib

              clarithromycin will increase the level or effect of osimertinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of osimertinib with strong CYP3A4 inhibitors. If no other alternative treatment exists, monitor patient more closely for adverse effects.

            • oxaliplatin

              clarithromycin and oxaliplatin both increase QTc interval. Avoid or Use Alternate Drug.

            • oxycodone

              clarithromycin increases levels of oxycodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Oxycodone dose reduction may be warranted when coadministered with strong CYP3A4 inhibitors.

            • palbociclib

              clarithromycin will increase the level or effect of palbociclib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of palbociclib with strong CYP3A inhibitors. If unable to avoid, reduce palbociclib dose to 75 mg/day.

            • panobinostat

              clarithromycin and panobinostat both increase QTc interval. Avoid or Use Alternate Drug. Panobinostat is known to significantly prolong QT interval. Panobinostat prescribing information states use with drugs known to prolong QTc is not recommended.

            • pazopanib

              clarithromycin will increase the level or effect of pazopanib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of pazopanib with strong CYP3A4 inhibitors if possible; if must coadminister, decrease pazopanib dose to 400 mg/day

              omeprazole will decrease the level or effect of pazopanib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Avoid coadministration of pazopanib with drugs that raise gastric pH; consider short-acting antacids in place of PPIs and H2 antagonists; separate antacid and pazopanib dosing by several hours

            • pemigatinib

              clarithromycin will increase the level or effect of pemigatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with strong or moderate CYP3A4 inhibitors is unavoidable, reduce pemigatinib dose (refer to drug monograph dosage modifications). After discontinuing the CYP3A4 inhibitor for 3 elimination half-lives, may resume previous pemigatinib dose.

            • pexidartinib

              amoxicillin and pexidartinib both increase Other (see comment). Avoid or Use Alternate Drug. Pexidartinib can cause hepatotoxicity. Avoid coadministration of pexidartinib with other products know to cause hepatoxicity.

              omeprazole will decrease the level or effect of pexidartinib by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Avoid coadministration of proton pump inhibitors (PPIs) with pexidartinib. Use H2-receptor antagonists or antacids if needed. When using alternatives to PPIs, administer pexidartinib 2 hr before or after taking locally-acting antacids OR administer pexidartinib at least 2 hr before or 10 hr after taking an H2-receptor antagonist.

            • perphenazine

              perphenazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • pretomanid

              amoxicillin, pretomanid. Either increases toxicity of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Pretomanid regimen associated with hepatotoxicity. Avoid alcohol and hepatotoxic agents, including herbal supplements and drugs other than bedaquiline and linezolid.

            • pexidartinib

              clarithromycin will increase the level or effect of pexidartinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with strong or moderate CYP3A4 inhibitors is unavoidable, reduce pexidartinib dose (refer to drug monograph dosage modifications). After discontinuing the CYP3A4 inhibitor for 3 elimination half-lives, may resume previous pexidartinib dose.

            • phenindione

              clarithromycin increases effects of phenindione by decreasing metabolism. Avoid or Use Alternate Drug.

            • phenobarbital

              phenobarbital will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • pimavanserin

              clarithromycin will increase the level or effect of pimavanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Decrease dose to 17 mg/day if pimavanserin is coadministered with strong CYP3A4 inhibitors.

              clarithromycin and pimavanserin both increase QTc interval. Avoid or Use Alternate Drug.

            • pitolisant

              clarithromycin and pitolisant both increase QTc interval. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of pitolisant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • pomalidomide

              clarithromycin increases levels of pomalidomide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin increases levels of pomalidomide by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

            • ponatinib

              clarithromycin increases levels of ponatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Decrease ponatinib starting dose to 30 mg qDay if coadministration with strong CYP3A4 inhibitors cannot be avoided.

              omeprazole decreases levels of ponatinib by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug.

            • ponesimod

              clarithromycin and ponesimod both increase QTc interval. Avoid or Use Alternate Drug.

            • rifampin

              rifampin will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • pralsetinib

              clarithromycin will increase the level or effect of pralsetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • prednisone

              clarithromycin will increase the level or effect of prednisone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • primaquine

              clarithromycin will increase the level or effect of primaquine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and primaquine both increase QTc interval. Avoid or Use Alternate Drug.

            • procainamide

              clarithromycin and procainamide both increase QTc interval. Avoid or Use Alternate Drug.

            • prochlorperazine

              prochlorperazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • progesterone intravaginal gel

              clarithromycin will increase the level or effect of progesterone intravaginal gel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • progesterone micronized

              clarithromycin will increase the level or effect of progesterone micronized by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • progesterone, natural

              clarithromycin will increase the level or effect of progesterone, natural by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • promazine

              promazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • promethazine

              promethazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • propafenone

              clarithromycin and propafenone both increase QTc interval. Avoid or Use Alternate Drug.

            • protamine

              clarithromycin increases effects of protamine by decreasing metabolism. Avoid or Use Alternate Drug.

            • protriptyline

              protriptyline and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • quetiapine

              clarithromycin will increase the level or effect of quetiapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • quinidine

              clarithromycin will increase the level or effect of quinidine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • quinupristin/dalfopristin

              quinupristin/dalfopristin increases levels of clarithromycin by decreasing metabolism. Contraindicated. Risk of prolonged QTc interval.

            • ranolazine

              clarithromycin will increase the level or effect of ranolazine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • repaglinide

              clarithromycin will increase the level or effect of repaglinide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • ribociclib

              clarithromycin will increase the level or effect of ribociclib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If a strong CYP3A inhibitor must be coadministered with ribociclib, reduce the ribociclib starting dose to 400 mg/day.

              ribociclib and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

              ribociclib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • rifabutin

              clarithromycin will increase the level or effect of rifabutin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • rifapentine

              rifapentine will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • rimegepant

              clarithromycin will increase the level or effect of rimegepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin will increase the level or effect of rimegepant by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug.

            • ritonavir

              clarithromycin will increase the level or effect of ritonavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • rivaroxaban

              clarithromycin increases levels of rivaroxaban by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of rivaroxaban and combined Pgp and strong CYP3A4 inhibitors. Combination may lead to significant increases in rivaroxaban levels and increase bleeding risk; however, according to the manufacturer, although clarithromycin is a combined P-gp and strong CYP3A4 inhibitor, pharmacokinetic data suggests that no precautions are necessary with concomitant administration with rivaroxaban in patients with normal renal function as the change in exposure is unlikely to affect the bleeding risk; however, combination is to be avoided in patients with mild or moderately impaired renal function (CrCl 15-80 mL/min) .

            • romidepsin

              clarithromycin will increase the level or effect of romidepsin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration with strong 3A4 inhibitors should be avoided if possible.

            • rosuvastatin

              clarithromycin increases toxicity of rosuvastatin by Other (see comment). Avoid or Use Alternate Drug. Comment: OATP1B1 inhibitors may increase risk of myopathy.

            • ruxolitinib

              clarithromycin will increase the level or effect of ruxolitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Reduce ruxolitinib starting dose to 10 mg BID with platelet count 100 X 10^9/L or more and concurrent use of strong CYP3A4 inhibitors; avoid with platelet counts <100 X 10^9/L

            • saquinavir

              clarithromycin will increase the level or effect of saquinavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              saquinavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.

            • sarecycline

              sarecycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • secobarbital

              secobarbital will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • secretin

              omeprazole, secretin. Other (see comment). Avoid or Use Alternate Drug. Comment: Concomitant use of PPIs may cause a hyperresponse in gastrin secretion in response to stimulation testing with secretin, falsely suggesting gastrinoma. The time it takes for serum gastrin concentrations to return to baseline following discontinuation of PPIs is specific to the individual PPI. Temporarily stop omeprazole treatment at least 14 days before assessing to allow gastrin levels to return to baseline.

            • selpercatinib

              clarithromycin will increase the level or effect of selpercatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • selumetinib

              clarithromycin will increase the level or effect of selumetinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If coadministration with strong or moderate CYP3A4 inhibitors cannot be avoided, reduce selumetinib dosage (refer to selumetinib monograph for further information). After discontinuation of the strong or moderate CYP3A4 inhibitor for 3 elimination half-lives, resume selumetinib dose that was taken before initiating the inhibitor.

            • sertraline

              clarithromycin and sertraline both increase QTc interval. Avoid or Use Alternate Drug.

            • sevoflurane

              clarithromycin and sevoflurane both increase QTc interval. Avoid or Use Alternate Drug.

            • sildenafil

              clarithromycin will increase the level or effect of sildenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of these phosphodiesterase inhibitors with clarithromycin, a CYP3A4 inhibitor is not recommended. Increased systemic exposure of these drugs may occur with clarithromycin; consider reduction of dosage for phosphodiesterase inhibitors.

            • silodosin

              clarithromycin will increase the level or effect of silodosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • siponimod

              clarithromycin will increase the level or effect of siponimod by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Coadministration of siponimod with a moderate or strong CYP3A4 inhibitor PLUS a moderate or strong CYP2C9 inhibitor is not recommended.

              clarithromycin and siponimod both increase QTc interval. Avoid or Use Alternate Drug.

              omeprazole will increase the level or effect of siponimod by affecting hepatic enzyme CYP2C9/10 metabolism. Avoid or Use Alternate Drug. Coadministration of siponimod with drugs that cause moderate CYP2C9 AND a moderate or strong CYP3A4 inhibition is not recommended. Caution if siponimod coadministered with moderate CYP2C9 inhibitors alone.

            • sirolimus

              clarithromycin will increase the level or effect of sirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • sofosbuvir/velpatasvir

              omeprazole will decrease the level or effect of sofosbuvir/velpatasvir by increasing gastric pH. Applies only to oral form of both agents. Avoid or Use Alternate Drug. Velpatasvir solubility decreases as gastric pH increases (practically insoluble at pH >5). Coadministration of sofosbuvir/velpatasvir with omeprazole or other PPIs is not recommended. If considered medically necessary, give sofosbuvir/velpatasvir with food 4 hr before omeprazole 20 mg. Use with other PPIs has not been studied.

            • solifenacin

              clarithromycin will increase the level or effect of solifenacin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and solifenacin both increase QTc interval. Avoid or Use Alternate Drug.

            • sonidegib

              clarithromycin will increase the level or effect of sonidegib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of sonidegib with strong CYP3A4 inhibitors.

            • sorafenib

              clarithromycin will increase the level or effect of sorafenib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • sotalol

              clarithromycin and sotalol both increase QTc interval. Avoid or Use Alternate Drug.

            • sotorasib

              omeprazole will decrease the level or effect of sotorasib by inhibition of GI absorption. Applies only to oral form of both agents. Avoid or Use Alternate Drug. If use with an acid-reducing agent cannot be avoided, administer sotorasib 4 hr before or 10 hr after administration of a locally-acting antacid.

            • stiripentol

              clarithromycin will increase the level or effect of stiripentol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • sunitinib

              clarithromycin will increase the level or effect of sunitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and sunitinib both increase QTc interval. Avoid or Use Alternate Drug.

            • suvorexant

              clarithromycin increases levels of suvorexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Suvorexant not recommended with use of strong CYP3A4 inhibitors.

            • tacrolimus

              clarithromycin will increase the level or effect of tacrolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and tacrolimus both increase QTc interval. Avoid or Use Alternate Drug.

            • tadalafil

              clarithromycin will increase the level or effect of tadalafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. For ED limit tadalafil to max of 2.5 mg/day (for daily use) or 10 mg dose every 72 hr (for use as needed). Avoid concurrent use of tadalafil for pulmonary HTN in patients taking strong CYP3A4 inhibitors.

            • talazoparib

              clarithromycin will increase the level or effect of talazoparib by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If coadministration with certain P-gp inhibitors (ie, amiodarone, carvedilol, clarithromycin, itraconazole, verapamil) cannot be avoided, reduce talazoparib dose to 0.75 mg qDay. Once P-gp inhibitors are discontinued, increase talazoparib dose (after 3-5 half-lives of the inhibitor) to dose used prior to initiating the P-gp inhibitor(s).

            • tamsulosin

              clarithromycin increases levels of tamsulosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • tazemetostat

              clarithromycin will increase the level or effect of tazemetostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration of tazemetostat with strong CYP3A4 inhibitors.

            • temsirolimus

              clarithromycin will increase the level or effect of temsirolimus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • teniposide

              clarithromycin will increase the level or effect of teniposide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • tepotinib

              clarithromycin will increase the level or effect of tepotinib by Other (see comment). Avoid or Use Alternate Drug. Interaction not studied clinically. Metabolism and data suggest drugs that are strong CYP3A4 and P-gp inhibitors may increase tepotinib (a P-gp and CYP3A4 substrate) effects and risk of toxicities.

            • tetrabenazine

              clarithromycin and tetrabenazine both increase QTc interval. Avoid or Use Alternate Drug.

            • tetracycline

              tetracycline decreases effects of amoxicillin by pharmacodynamic antagonism. Avoid or Use Alternate Drug. Tetracyclines may interfere with the bactericidal action of penicillins. Monitor for decreased therapeutic effects of penicillins if concomitantly used with a tetracycline.

            • theophylline

              clarithromycin will increase the level or effect of theophylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • thioridazine

              thioridazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • tiagabine

              clarithromycin will increase the level or effect of tiagabine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • tipranavir

              clarithromycin will increase the level or effect of tipranavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              tipranavir, clarithromycin. Either increases levels of the other by decreasing metabolism. Avoid or Use Alternate Drug. No dose adjustment necessary in normal renal function. If ClCr = 30 60 ml/min, decr clarithromycin dose by 50%. If ClCr < 30 ml/min, decr clarithromycin dose by 75%.

              tipranavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • tofacitinib

              clarithromycin increases levels of tofacitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Reduce tofacitinib dose to 5 mg qDay when coadministered with potent CYP3A4 inhibitors.

            • tolterodine

              clarithromycin will increase the level or effect of tolterodine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • tolvaptan

              clarithromycin will increase the level or effect of tolvaptan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • topotecan

              clarithromycin will increase the level or effect of topotecan by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Product labeling for PO topotecan recommends avoiding concomitant use of P-gp inhibitors; the interaction with IV topotecan may be less severe but is still likely of clinical significance

            • toremifene

              clarithromycin increases levels of toremifene by decreasing metabolism. Avoid or Use Alternate Drug. Concurrent use of toremifene with agents causing QT prolongation should be avoided. If concomitant use is required it's recommended that toremifene be interrupted. If interruption not possible, patients requiring therapy with a drug that prolongs QT should be closely monitored. ECGs should be obtained for high risk patients.

              clarithromycin will increase the level or effect of toremifene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              clarithromycin and toremifene both increase QTc interval. Avoid or Use Alternate Drug.

            • trabectedin

              clarithromycin will increase the level or effect of trabectedin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If strong CYP3A inhibitor must be used, short-term (eg, less than 14 days), administer strong CYP3A inhibitor 1 week after trabectedin infusion, and discontinue the day prior to next trabectedin infusion

            • trazodone

              clarithromycin will increase the level or effect of trazodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

              trazodone and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • triamcinolone acetonide injectable suspension

              clarithromycin will increase the level or effect of triamcinolone acetonide injectable suspension by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • triazolam

              clarithromycin will increase the level or effect of triazolam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug.

            • triclabendazole

              clarithromycin and triclabendazole both increase QTc interval. Avoid or Use Alternate Drug.

            • trifluoperazine

              trifluoperazine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • trimipramine

              trimipramine and clarithromycin both increase QTc interval. Avoid or Use Alternate Drug.

            • tucatinib

              tucatinib will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of tucatinib with CYP3A substrates, where minimal concentration changes may lead to serious or life-threatening toxicities. If unavoidable, reduce CYP3A substrate dose according to product labeling.

              tucatinib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid concomitant use of tucatinib with CYP3A substrates, where minimal concentration changes may lead to serious or life-threatening toxicities. If unavoidable, reduce CYP3A substrate dose according to product labeling.

            • typhoid vaccine live

              amoxicillin decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Wait until Abx Tx complete to administer live bacterial vaccine.

              clarithromycin decreases effects of typhoid vaccine live by pharmacodynamic antagonism. Contraindicated. Wait until Abx Tx complete to administer live bacterial vaccine.

            • voxelotor

              voxelotor will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Voxelotor increases systemic exposure of sensitive CYP3A4 substrates. Avoid coadministration with sensitive CYP3A4 substrates with a narrow therapeutic index. Consider dose reduction of the sensitive CYP3A4 substrate(s) if unable to avoid.

            Monitor Closely (375)

            • abemaciclib

              clarithromycin will increase the level or effect of abemaciclib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Strong CYP3A4 inhibitors increase plasma levels of abemaciclib and its metabolites. Abemaciclib dose reduction required. If a strong CYP3A4 inhibitor is discontinued, increase abemaciclib to the dose prior to initiating the strong inhibitor.

            • abiraterone

              clarithromycin increases levels of abiraterone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Avoid or use with caution, strong inhibitors of 3A4 during abiraterone therapy.

            • acyclovir

              amoxicillin, acyclovir. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • albuterol

              albuterol and clarithromycin both increase QTc interval. Use Caution/Monitor.

            • alfentanil

              clarithromycin will increase the level or effect of alfentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • alfuzosin

              clarithromycin will increase the level or effect of alfuzosin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin and alfuzosin both increase QTc interval. Use Caution/Monitor.

            • allopurinol

              allopurinol decreases toxicity of amoxicillin by Other (see comment). Use Caution/Monitor. Comment: Allopurinol may increase potential for allergic or hypersensitivity reactions to amoxicillin.

            • alosetron

              clarithromycin will increase the level or effect of alosetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • amikacin

              clarithromycin will increase the level or effect of amikacin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • amitriptyline

              clarithromycin will increase the level or effect of amitriptyline by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • amlodipine

              clarithromycin will increase the level or effect of amlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • amobarbital

              amobarbital will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • ampicillin

              omeprazole will decrease the level or effect of ampicillin by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • apalutamide

              clarithromycin will increase the level or effect of apalutamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of apalutamide with strong CYP3A4 or CYP2C8 inhibitors does not require initial dosage modification; however, dose reduction may be needed based on tolerability.

            • arformoterol

              arformoterol and clarithromycin both increase QTc interval. Use Caution/Monitor.

            • armodafinil

              armodafinil will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of armodafinil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • aspirin

              amoxicillin, aspirin. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

              amoxicillin, aspirin. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • aspirin rectal

              amoxicillin, aspirin rectal. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

              amoxicillin, aspirin rectal. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

            • aspirin/citric acid/sodium bicarbonate

              amoxicillin, aspirin/citric acid/sodium bicarbonate. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

              amoxicillin, aspirin/citric acid/sodium bicarbonate. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

            • atazanavir

              clarithromycin will increase the level or effect of atazanavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • avapritinib

              omeprazole will increase the level or effect of avapritinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • atogepant

              clarithromycin will increase the level or effect of atogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Recommended atogepant dosage is 10 mg PO qDay when coadministered with strong CYP3A4 inhibitors.

            • axitinib

              omeprazole increases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • azithromycin

              azithromycin and clarithromycin both increase QTc interval. Use Caution/Monitor.

            • balsalazide

              clarithromycin will decrease the level or effect of balsalazide by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor.

            • bazedoxifene/conjugated estrogens

              clarithromycin will decrease the level or effect of bazedoxifene/conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

              amoxicillin will decrease the level or effect of bazedoxifene/conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

              clarithromycin will increase the level or effect of bazedoxifene/conjugated estrogens by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • bedaquiline

              clarithromycin and bedaquiline both increase QTc interval. Modify Therapy/Monitor Closely. ECG should be monitored closely

            • bendroflumethiazide

              amoxicillin, bendroflumethiazide. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • belzutifan

              omeprazole will increase the level or effect of belzutifan by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Belzutifan is a CYP2C19 substrate. Coadministration with CYP2C19 inhibitors may increase incidence or severity of adverse effects. Monitor for anemia and hypoxia and reduce belzutifan dose as recommended.

              belzutifan will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If unable to avoid coadministration of belzutifan with sensitive CYP3A4 substrates, consider increasing the sensitive CYP3A4 substrate dose in accordance with its prescribing information.

            • bendamustine

              omeprazole decreases levels of bendamustine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor. Concentrations of active metabolites may be increased.

            • benzhydrocodone/acetaminophen

              clarithromycin will increase the level or effect of benzhydrocodone/acetaminophen by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with strong CYP3A4 inhibitors may increase hydrocodone (benzhydrocodone is prodrug of hydrocodone) plasma concentrations and can result in potentially fatal respiratory depression

            • berotralstat

              clarithromycin increases levels of berotralstat by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Reduced berotralstat dose to 110 mg/day when coadministered with P-gp inhibitors.

            • betrixaban

              clarithromycin increases levels of betrixaban by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Decrease betrixaban dose to 80 mg PO once, then 40 mg PO qDay if coadministered with a P-gp inhibitor.

            • bexarotene

              clarithromycin will increase the level or effect of bexarotene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • biotin

              clarithromycin will decrease the level or effect of biotin by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor.

            • bortezomib

              clarithromycin will increase the level or effect of bortezomib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              bortezomib will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • bosentan

              clarithromycin will increase the level or effect of bosentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • bosutinib

              omeprazole decreases levels of bosutinib by Other (see comment). Use Caution/Monitor. Comment: PPIs may decrease bosutinib concentration by ~45%; bosutinib displays pH-dependent solubility.

            • brentuximab vedotin

              clarithromycin increases levels of brentuximab vedotin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor patients for adverse reactions. .

            • brexpiprazole

              clarithromycin will increase the level or effect of brexpiprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Administer half of the usual brexpiprazole dose when coadministered with strong CYP3A4 inhibitors. If also administered with a strong/moderate CYP2D6 inhibitor, administer a quarter of brexpiprazole dose.

            • bromocriptine

              clarithromycin increases levels of bromocriptine by decreasing metabolism. Use Caution/Monitor. Increased levels possibly due to CYP3A4 inhibition.

            • budesonide

              clarithromycin will increase the level or effect of budesonide by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              omeprazole decreases effects of budesonide by increasing gastric pH. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Enteric-coated budesonide dissolves at pH >5.5. Also, dissolution of extended-release budesonide tablets is pH dependent. Coadministration with drugs that increase gastric pH may cause these budesonide products to prematurely dissolve, and possibly affect release properties and absorption of the drug in the duodenum.

            • buprenorphine subdermal implant

              clarithromycin will increase the level or effect of buprenorphine subdermal implant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor patients already on buprenorphine subdermal implant who require newly-initiated treatment with CYP3A4 inhibitors for signs and symptoms of overmedication. If the dose of the concomitant CYP3A4 inhibitor cannot be reduced or discontinued, implant removal may be necessary and the patient should then be treated with a buprenorphine dosage form that permits dose adjustments. If a CYP3A4 inhibitor is discontinued in a patient who has been stabilized on buprenorphine, monitor the patient for withdrawal.

            • butabarbital

              butabarbital will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • buprenorphine, long-acting injection

              clarithromycin will increase the level or effect of buprenorphine, long-acting injection by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Patients who transfer to buprenorphine long-acting injection from transmucosal buprenorphine coadministered with CYP3A4 inhibitors should be monitored to ensure buprenorphine plasma levels are adequate. Within 2 weeks, if signs and symptoms of buprenorphine toxicity or overdose occur and the concomitant CYP3A4 inhibitor cannot be reduced or discontinued, transition the patient back to a buprenorphine formulation that permits dose adjustments.

            • butalbital

              butalbital will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • calcifediol

              clarithromycin, calcifediol. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. CYP450 inhibitors may inhibit enzymes involved in vitamin D metabolism (CYP24A1 and CYP27B1). This may alter serum levels of calcifediol and decrease the conversion of calcifediol to calcitriol. Dose adjustment of calcifediol may be required, and serum 25­hydroxyvitamin D, intact PTH, and serum calcium concentrations should be closely monitored when initiating or discontinuing a strong CYP3A4 inhibitor.

            • cannabidiol

              cannabidiol will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the dose of sensitive CYP2C19 substrates, as clinically appropriate, when coadministered with cannabidiol.

              clarithromycin will increase the level or effect of cannabidiol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Consider reducing the cannabidiol dose when coadministered with a strong CYP3A4 inhibitor.

              omeprazole will increase the level or effect of cannabidiol by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the cannabidiol dose when coadministered with a strong CYP2C19 inhibitor.

            • capmatinib

              clarithromycin will increase the level or effect of capmatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • carbamazepine

              carbamazepine will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • carbonyl iron

              omeprazole will decrease the level or effect of carbonyl iron by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • cariprazine

              clarithromycin will increase the level or effect of cariprazine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with strong CYP3A4 inhibitors requires cariprazine dose reduction. See Dosage Modification section in drug monograph.

            • cefdinir

              clarithromycin decreases effects of cefdinir by pharmacodynamic antagonism. Use Caution/Monitor. bacteriostatic agents may inhibit the effects of bactericidal agents.

            • cefditoren

              clarithromycin decreases effects of cefditoren by pharmacodynamic antagonism. Use Caution/Monitor. bacteriostatic agents may inhibit the effects of bactericidal agents.

            • cefoxitin

              clarithromycin decreases effects of cefoxitin by pharmacodynamic antagonism. Use Caution/Monitor. bacteriostatic agents may inhibit the effects of bactericidal agents.

            • cefpodoxime

              clarithromycin decreases effects of cefpodoxime by pharmacodynamic antagonism. Use Caution/Monitor. bacteriostatic agents may inhibit the effects of bactericidal agents.

              omeprazole decreases effects of cefpodoxime by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • cefuroxime

              clarithromycin decreases effects of cefuroxime by pharmacodynamic antagonism. Use Caution/Monitor. bacteriostatic agents may inhibit the effects of bactericidal agents.

              omeprazole decreases effects of cefuroxime by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • cenobamate

              cenobamate will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider a dose reduction of CYP2C19 substrates, as clinically appropriate, when used concomitantly with cenobamate.

              cenobamate will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Increase dose of CYP3A4 substrate, as needed, when coadministered with cenobamate.

              cenobamate will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Increase dose of CYP3A4 substrate, as needed, when coadministered with cenobamate.

            • ceritinib

              clarithromycin increases levels of ceritinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • chlorothiazide

              amoxicillin, chlorothiazide. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • choline magnesium trisalicylate

              amoxicillin, choline magnesium trisalicylate. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

              amoxicillin, choline magnesium trisalicylate. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

            • ciprofloxacin

              omeprazole will decrease the level or effect of ciprofloxacin by unknown mechanism. Use Caution/Monitor. Absorption of the ciprofloxacin ER tablet was slightly diminished (20%) when coadministered with omeprazole.

            • cevimeline

              clarithromycin will increase the level or effect of cevimeline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • chlordiazepoxide

              clarithromycin will increase the level or effect of chlordiazepoxide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • chlorpropamide

              clarithromycin increases levels of chlorpropamide by plasma protein binding competition. Use Caution/Monitor. Risk of hypoglycemia.

            • cholic acid

              clarithromycin increases toxicity of cholic acid by decreasing elimination. Modify Therapy/Monitor Closely. Avoid concomitant use of inhibitors of the bile salt efflux pump (BSEP). May exacerbate accumulation of conjugated bile salts in the liver and result in clinical symptoms. If concomitant use is necessary, monitor serum transaminases and bilirubin.

            • ciclesonide inhaled

              clarithromycin will increase the level or effect of ciclesonide inhaled by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • cimetidine

              cimetidine will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of cimetidine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • citalopram

              omeprazole will increase the level or effect of citalopram by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Citalopram 20 mg/day is the maximum recommended dose for patients taking CYP2C19 inhibitors because of the risk of QT prolongation.

            • clevidipine

              clarithromycin will increase the level or effect of clevidipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • clobazam

              omeprazole will increase the level or effect of clobazam by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Dosage adjustment may be required; CYP2C19 inhibitors may result in increased exposure to N-desmethylclobazam (active metabolite).

            • clobetasone

              clarithromycin will increase the level or effect of clobetasone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • clonazepam

              clarithromycin will increase the level or effect of clonazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • clorazepate

              clarithromycin will increase the level or effect of clorazepate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • clozapine

              omeprazole will decrease the level or effect of clozapine by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

            • cobicistat

              cobicistat will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • conivaptan

              conivaptan will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • conjugated estrogens

              clarithromycin will decrease the level or effect of conjugated estrogens by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

              clarithromycin will increase the level or effect of conjugated estrogens by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • conjugated estrogens, vaginal

              clarithromycin will increase the level or effect of conjugated estrogens, vaginal by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • cortisone

              clarithromycin will increase the level or effect of cortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • crizotinib

              omeprazole will decrease the level or effect of crizotinib by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor. Drugs that elevate the gastric pH may decrease the solubility of crizotinib and subsequently reduce its bioavailability. However, no formal studies have been conducted.

              clarithromycin increases levels of crizotinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Concomitant use of strong CYP3A inhibitors should be avoided. ECG monitoring is recommended, along with drugs that may prolong the QT interval.

            • crofelemer

              crofelemer increases levels of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Crofelemer has the potential to inhibit CYP3A4 at concentrations expected in the gut; unlikely to inhibit systemically because minimally absorbed.

            • cyclopenthiazide

              amoxicillin, cyclopenthiazide. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • cyclosporine

              omeprazole, cyclosporine. Either increases toxicity of the other by Other (see comment). Use Caution/Monitor. Comment: Long-term use of PPIs may cause hypomagnesemia and increase this risk when coadministered with drugs that may also decrease magnesium levels.

            • cyclosporine

              clarithromycin will increase the level or effect of cyclosporine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • dabigatran

              clarithromycin will increase the level or effect of dabigatran by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Atrial fibrillation: Avoid coadministering dabigatran with P-gp inhibitors if CrCl <30 mL/min. DVT/PE treatment: Avoid coadministering dabigatran with P-gp inhibitors if CrCl <50 mL/min

            • dabrafenib

              dabrafenib will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Use alternative if available

              omeprazole will decrease the level or effect of dabrafenib by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor. Drugs that alter upper GI tract pH (eg, PPIs, H2-blockers, antacids) may decrease dabrafenib solubility and reduce its bioavailability

              dabrafenib will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.

            • dapsone

              clarithromycin will increase the level or effect of dapsone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • dextroamphetamine

              omeprazole, dextroamphetamine. Other (see comment). Use Caution/Monitor. Comment: Reduced gastric acidity caused by proton pump inhibitors decreases time to Tmax for amphetamine and dextroamphetamine. AUC was unaffected. .

            • darolutamide

              clarithromycin will increase the level or effect of darolutamide by Other (see comment). Modify Therapy/Monitor Closely. Darolutamide is a P-gp and CYP3A4 substrate. Closely monitor for increased adverse reactions and modify dose of darolutamide as needed when coadministered with drugs that are both P-gp and strong or moderate CYP3A4 inhibitors.

            • darunavir

              clarithromycin will increase the level or effect of darunavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Consider alternative antibiotics if clarithromycin coadministered with darunavir (plus ritonavir or cobicistat). If clarithromycin is necessary, no dose adjustment required with normal renal function; however, reduce clarithromycin dose by 50% with CrCl 30-60 mL/min and by 75% with CrCl <30 mL/min.

              darunavir increases levels of clarithromycin by decreasing metabolism. Use Caution/Monitor. No dose adjustment necessary in normal renal function. If ClCr = 30 60 ml/min, decr clarithromycin dose by 50%. If ClCr < 30 ml/min, decr clarithromycin dose by 75%.

            • dasatinib

              clarithromycin and dasatinib both increase QTc interval. Modify Therapy/Monitor Closely.

            • daunorubicin

              clarithromycin will increase the level or effect of daunorubicin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • deferasirox

              deferasirox will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • deflazacort

              clarithromycin will increase the level or effect of deflazacort by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Decrease deflazacort dose to one-third of the recommended dose if coadministered with moderate or strong CYP3A4 inhibitors.

              clarithromycin will increase the level or effect of deflazacort by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • dexamethasone

              clarithromycin will increase the level or effect of dexamethasone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • diazepam intranasal

              clarithromycin will increase the level or effect of diazepam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Strong or moderate CYP3A4 inhibitors may decrease rate of diazepam elimination, thereby increasing adverse reactions to diazepam.

              omeprazole will increase the level or effect of diazepam intranasal by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Strong or moderate CYP2C19 inhibitors may decrease rate of diazepam elimination, thereby increasing adverse reactions to diazepam.

            • dichlorphenamide

              dichlorphenamide and omeprazole both decrease serum potassium. Use Caution/Monitor.

            • dienogest/estradiol valerate

              amoxicillin will decrease the level or effect of dienogest/estradiol valerate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. An alternate or additional form of birth control may be advisable during concomitant use.

              clarithromycin will increase the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor for potential adverse effects such as nausea, irregular uterine bleeding, breast tenderness and headache.

              clarithromycin will decrease the level or effect of dienogest/estradiol valerate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. An alternate or additional form of birth control may be advisable during concomitant use.

            • digoxin

              clarithromycin will increase the level or effect of digoxin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              omeprazole increases toxicity of digoxin by Other (see comment). Use Caution/Monitor. Comment: Prolonged use of PPIs may cause hypomagnesemia and increase risk for digoxin toxicity.

            • estradiol

              amoxicillin will decrease the level or effect of estradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

            • diltiazem

              clarithromycin will increase the level or effect of diltiazem by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • efavirenz

              efavirenz will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

              efavirenz will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • disopyramide

              clarithromycin will increase the level or effect of disopyramide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • docetaxel

              clarithromycin will increase the level or effect of docetaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of docetaxel by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • dolasetron

              clarithromycin and dolasetron both increase QTc interval. Modify Therapy/Monitor Closely.

            • donepezil

              clarithromycin will increase the level or effect of donepezil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • doravirine

              clarithromycin will increase the level or effect of doravirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of doravirine and CYP3A4 inhibitors may increase plasma concentrations and toxicities of doravirine.

            • doxepin cream

              clarithromycin will increase the level or effect of doxepin cream by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • doxorubicin

              clarithromycin will increase the level or effect of doxorubicin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of doxorubicin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • doxorubicin liposomal

              clarithromycin will increase the level or effect of doxorubicin liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of doxorubicin liposomal by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • dronabinol

              clarithromycin will increase the level or effect of dronabinol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Dronabinol is a CYP3A4 substrate.

            • dutasteride

              clarithromycin will increase the level or effect of dutasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • duvelisib

              clarithromycin will increase the level or effect of duvelisib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with a strong CYP3A4 inhibitor increases duvelisib AUC, which may increase the risk of duvelisib toxicities. Reduce duvelisib dose to 15 mg BID when coadministered with a strong CYP3A4 inhibitor.

              duvelisib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. will increase the level or effect of

              clarithromycin will increase the level or effect of duvelisib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • efavirenz

              clarithromycin will increase the level or effect of efavirenz by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • elagolix

              elagolix will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak inhibitor of CYP2C19. No dose adjustments are needed for omeprazole with 40 mg/day or less. Consider omeprazole dose reduction with higher omeprazole doses (eg, dose for Zollinger-Ellison) if coadministered with elagolix.

              clarithromycin will increase the level or effect of elagolix by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration of elagolix 200 mg BID with strong CYP3A inhibitors for >1 month is not recommended. Limit elagolix dose to 150 mg qDay and CYP3A inhibitor duration of use to 6 months if coadministered.

              elagolix decreases levels of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak-to-moderate CYP3A4 inducer. Monitor CYP3A substrates if coadministered. Consider increasing CYP3A substrate dose if needed.

              elagolix will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Elagolix is a weak-to-moderate CYP3A4 inducer. Monitor CYP3A substrates if coadministered. Consider increasing CYP3A substrate dose if needed.

            • eltrombopag

              omeprazole will decrease the level or effect of eltrombopag by affecting hepatic enzyme CYP1A2 metabolism. Use Caution/Monitor.

            • elvitegravir

              clarithromycin increases levels of elvitegravir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Elvitegravir is a CYP3A4 substrate; if coadministered with strong CYP3A4 inhibitors may increase levels.

            • eluxadoline

              omeprazole increases levels of eluxadoline by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. As a precautionary measure due to incomplete information on the metabolism of eluxadoline, use caution when coadministered with strong CYP2C19 inhibitors.

            • elvitegravir/cobicistat/emtricitabine/tenofovir DF

              elvitegravir/cobicistat/emtricitabine/tenofovir DF, clarithromycin. Either increases levels of the other by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Concentrations of clarithromycin and/or cobicistat may be increased; decrease clarithromycin dose by 50% if CrCl <60 mL/min.

            • encorafenib

              encorafenib, omeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

              encorafenib, clarithromycin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Encorafenib both inhibits and induces CYP3A4 at clinically relevant plasma concentrations. Coadministration of encorafenib with sensitive CYP3A4 substrates may result in increased toxicity or decreased efficacy of these agents.

            • enfortumab vedotin

              clarithromycin increases toxicity of enfortumab vedotin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Enfortumab vedotin is an antibody-drug conjugate that releases monomethylauristatin E (MMAE) via proteolytic cleavage. MMAE is primarily metabolized by CYP3A4 in vitro. Coadministration with strong CYP3A4 inhibitors may increase free MMAE exposure, which may increase the incidence or severity of toxicities.

            • escitalopram

              omeprazole will increase the level or effect of escitalopram by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • enzalutamide

              enzalutamide will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • eplerenone

              clarithromycin will increase the level or effect of eplerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • erlotinib

              clarithromycin will increase the level or effect of erlotinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • erythromycin base

              clarithromycin will increase the level or effect of erythromycin base by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              erythromycin base will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • erythromycin ethylsuccinate

              erythromycin ethylsuccinate will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • erythromycin lactobionate

              erythromycin lactobionate will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • erythromycin stearate

              erythromycin stearate will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • eslicarbazepine acetate

              eslicarbazepine acetate will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • estradiol

              clarithromycin will decrease the level or effect of estradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

              clarithromycin will increase the level or effect of estradiol by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • estradiol vaginal

              clarithromycin will increase the level or effect of estradiol vaginal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with CYP3A4 inhibitors may increase plasma concentrations of estrogens and toxicities.

            • estrogens conjugated synthetic

              clarithromycin will decrease the level or effect of estrogens conjugated synthetic by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

              clarithromycin will increase the level or effect of estrogens conjugated synthetic by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • estrogens esterified

              clarithromycin will increase the level or effect of estrogens esterified by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • estropipate

              clarithromycin will decrease the level or effect of estropipate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

              clarithromycin will increase the level or effect of estropipate by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • eszopiclone

              clarithromycin increases levels of eszopiclone by enhancing GI absorption. Applies only to oral form of both agents. Use Caution/Monitor.

              clarithromycin increases levels of eszopiclone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce eszopiclone starting dose to 1 mg/day.

            • ethinylestradiol

              amoxicillin will decrease the level or effect of ethinylestradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

              clarithromycin will decrease the level or effect of ethinylestradiol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

            • etoposide

              clarithromycin will increase the level or effect of etoposide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of etoposide by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • hydrochlorothiazide

              amoxicillin, hydrochlorothiazide. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • etravirine

              etravirine will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • eucalyptus

              clarithromycin will increase the level or effect of eucalyptus by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • ezogabine

              ezogabine, clarithromycin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Slight and transient QT-prolongation observed with ezogabine, particularly when dose titrated to 1200 mg/day. QT interval should be monitored when ezogabine is prescribed with agents known to increase QT interval.

            • fedratinib

              fedratinib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP3A4 substrates as necessary.

              fedratinib will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Adjust dose of drugs that are CYP3A4 substrates as necessary.

            • felodipine

              clarithromycin will increase the level or effect of felodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • ferric gluconate

              omeprazole will decrease the level or effect of ferric gluconate by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • ferric maltol

              omeprazole will decrease the level or effect of ferric maltol by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • ferrous fumarate

              omeprazole will decrease the level or effect of ferrous fumarate by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • ferrous gluconate

              omeprazole will decrease the level or effect of ferrous gluconate by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • ferrous sulfate

              omeprazole will decrease the level or effect of ferrous sulfate by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • fexinidazole

              fexinidazole will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • finasteride

              clarithromycin will increase the level or effect of finasteride by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • finerenone

              omeprazole will increase the level or effect of finerenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Monitor serum potassium during initiation and dosage adjustment of either finererone or weak CYP3A4 inhibitors. Adjust finererone dosage as needed.

            • flecainide

              clarithromycin and flecainide both increase QTc interval. Modify Therapy/Monitor Closely.

            • flibanserin

              omeprazole will increase the level or effect of flibanserin by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Coadministration of flibanserin with strong CYP2C19 inhibitors may increase flibanserin exposure and increase the risk of hypotension, syncope, and CNS depression.

              omeprazole will increase the level or effect of flibanserin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased flibanserin adverse effects may occur if coadministered with multiple weak CYP3A4 inhibitors.

            • fluconazole

              fluconazole will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • fludrocortisone

              clarithromycin will increase the level or effect of fludrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • fluoxetine

              clarithromycin and fluoxetine both increase QTc interval. Modify Therapy/Monitor Closely.

            • flurazepam

              clarithromycin will increase the level or effect of flurazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • fluticasone furoate

              clarithromycin will increase the level or effect of fluticasone furoate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Strong CYP3A4 inhibitors may increase fluticasone systemic exposure

            • fluticasone inhaled

              clarithromycin will increase the level or effect of fluticasone inhaled by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Strong CYP3A4 inhibitors may increase fluticasone systemic exposure

            • fluvoxamine

              fluvoxamine and clarithromycin both increase QTc interval. Modify Therapy/Monitor Closely.

            • fosamprenavir

              omeprazole will decrease the level or effect of fosamprenavir by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • foscarnet

              clarithromycin and foscarnet both increase QTc interval. Modify Therapy/Monitor Closely.

            • fosphenytoin

              omeprazole will increase the level or effect of fosphenytoin by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor.

              fosphenytoin will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • fostamatinib

              clarithromycin will increase the level or effect of fostamatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Strong CYP3A4 inhibitors may increase exposure to R406 (fostamatinib major active metabolite). Monitor for toxicities that may require fostamatinib dose reduction.

            • galantamine

              clarithromycin will increase the level or effect of galantamine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • gefitinib

              omeprazole decreases levels of gefitinib by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor. Avoid coadministration of gefitinib with PPIs if possible. If treatment with a PPI is required, separate gefitinib and PPI doses by 12 hr.

              clarithromycin increases levels of gefitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration of strong CYP3A4 inhibitors may increase risk for gefitinib adverse effects.

            • gemtuzumab

              clarithromycin and gemtuzumab both increase QTc interval. Use Caution/Monitor.

            • glyburide

              omeprazole will increase the level or effect of glyburide by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor.

            • gentamicin

              clarithromycin will increase the level or effect of gentamicin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • glecaprevir/pibrentasvir

              clarithromycin will increase the level or effect of glecaprevir/pibrentasvir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • glimepiride

              clarithromycin increases levels of glimepiride by plasma protein binding competition. Use Caution/Monitor. Risk of hypoglycemia.

            • glipizide

              clarithromycin increases levels of glipizide by plasma protein binding competition. Use Caution/Monitor. Risk of hypoglycemia.

            • glyburide

              clarithromycin increases levels of glyburide by plasma protein binding competition. Use Caution/Monitor. Risk of hypoglycemia.

            • goserelin

              goserelin increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

            • guanfacine

              clarithromycin will increase the level or effect of guanfacine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Strong or moderate CYP3A4 inhibitors significantly increase guanfacine plasma concentrations. FDA-approved labeling for extended-release (ER) guanfacine recommends that, if coadministered, the guanfacine dosage should be decreased to half of the recommended dose. Specific recommendations for immediate-release (IR) guanfacine are not available.

            • histrelin

              histrelin increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

            • hydrocodone

              clarithromycin will increase the level or effect of hydrocodone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with CYP3A4 inhibitors may increase hydrocodone plasma concentrations and can result in potentially fatal respiratory depression

            • hydrocortisone

              clarithromycin will increase the level or effect of hydrocortisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • hydroxyzine

              hydroxyzine increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

            • ifosfamide

              clarithromycin will decrease the level or effect of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration of CYP3A4 inhibitors may decrease the metabolism of ifosfamide to its active alkylating metabolites and decrease the efficacy of ifosfamide.

            • iloperidone

              clarithromycin and iloperidone both increase QTc interval. Modify Therapy/Monitor Closely.

              iloperidone increases levels of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Iloperidone is a time-dependent CYP3A inhibitor and may lead to increased plasma levels of drugs predominantly eliminated by CYP3A4.

              iloperidone increases levels of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Iloperidone is a time-dependent CYP3A inhibitor and may lead to increased plasma levels of drugs predominantly eliminated by CYP3A4.

            • imatinib

              clarithromycin will increase the level or effect of imatinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of imatinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • imipramine

              omeprazole will increase the level or effect of imipramine by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • indacaterol, inhaled

              clarithromycin increases levels of indacaterol, inhaled by Other (see comment). Use Caution/Monitor. Comment: Data suggests that systemic clearance is influenced by modulation of both P-gp and CYP3A4 activities. No dose adjustment is warranted at the 75 mcg dose.

              indacaterol, inhaled, clarithromycin. QTc interval. Use Caution/Monitor. Drugs that are known to prolong the QTc interval may have an increased the risk of ventricular arrhythmias.

            • indinavir

              clarithromycin will increase the level or effect of indinavir by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • iron dextran complex

              omeprazole will decrease the level or effect of iron dextran complex by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • iron sucrose

              omeprazole will decrease the level or effect of iron sucrose by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • isavuconazonium sulfate

              omeprazole will increase the level or effect of isavuconazonium sulfate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • isoniazid

              isoniazid will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely.

            • isradipine

              clarithromycin will increase the level or effect of isradipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • istradefylline

              clarithromycin will increase the level or effect of istradefylline by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Do not exceed istradefylline 20 mg/day if coadministered with strong CYP3A4 inhibitors.

              istradefylline will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of CYP3A4 substrates in clinical trials. This effect was not observed with istradefylline 20 mg/day. Consider dose reduction of sensitive CYP3A4 substrates.

              istradefylline will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of CYP3A4 substrates in clinical trials. This effect was not observed with istradefylline 20 mg/day. Consider dose reduction of sensitive CYP3A4 substrates.

            • itraconazole

              clarithromycin will increase the level or effect of itraconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin and itraconazole both increase QTc interval. Use Caution/Monitor.

            • ledipasvir/sofosbuvir

              omeprazole decreases levels of ledipasvir/sofosbuvir by Other (see comment). Use Caution/Monitor. Comment: Ledipasvir solubility decreases as pH increases; drugs that increase gastric pH are expected to decrease levels of ledipasvir; proton-pump inhibitor doses comparable to omeprazole <20 mg can be administered simultaneously with ledipasvir/sofosbuvir under fasted conditions.

            • ivacaftor

              clarithromycin will increase the level or effect of ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce ivacaftor dose if coadministered with strong CYP3A4 inhibitors. See specific ivacaftor-containing product for precise dosage modification.

            • ivermectin

              clarithromycin will increase the level or effect of ivermectin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • ketoconazole

              clarithromycin will increase the level or effect of ketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • lacosamide

              clarithromycin increases levels of lacosamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Consider decreasing lacosamide dose when coadministered with strong CYP3A4 inhibitors.

            • lansoprazole

              clarithromycin will increase the level or effect of lansoprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • lapatinib

              clarithromycin will increase the level or effect of lapatinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              clarithromycin and lapatinib both increase QTc interval. Modify Therapy/Monitor Closely.

            • lemborexant

              omeprazole will increase the level or effect of lemborexant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Lower nightly dose of lemborexant recommended if coadministered with weak CYP3A4 inhibitors. See drug monograph for specific dosage modification.

            • lenvatinib

              clarithromycin and lenvatinib both increase QTc interval. Use Caution/Monitor. Lenvatinib prescribing information recommends monitoring ECG closely when coadministered with QT prolonging drugs.

            • letermovir

              clarithromycin increases levels of letermovir by decreasing metabolism. Use Caution/Monitor. Coadminstration of letermovir, an OATP1B1/3 substrate, with OATP1B1/3 inhibitors may increase letermovir plasma concentrations.

              letermovir increases levels of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor and dose adjustment may be necessary.

            • leuprolide

              leuprolide increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

            • levonorgestrel oral/ethinylestradiol/ferrous bisglycinate

              amoxicillin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

            • lomitapide

              omeprazole increases levels of lomitapide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lomitapide dose should not exceed 30 mg/day.

            • levalbuterol

              clarithromycin and levalbuterol both increase QTc interval. Use Caution/Monitor.

            • levamlodipine

              clarithromycin will increase the level or effect of levamlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Coadministration with moderate and strong CYP3A inhibitors results in increased systemic exposure to amlodipine and may require dose reduction. Monitor for symptoms of hypotension and edema when amlodipine is coadministered with CYP3A inhibitors to determine the need for dose adjustment.

            • levofloxacin

              clarithromycin and levofloxacin both increase QTc interval. Modify Therapy/Monitor Closely.

            • levomilnacipran

              clarithromycin will increase the level or effect of levomilnacipran by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Do not exceed 80 mg/day of levomilnacipran when coadministered with strong CYP3A4 inhibitors

            • levonorgestrel oral/ethinylestradiol/ferrous bisglycinate

              clarithromycin will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor. Antibiotics may decrease hormonal contraceptive efficacy.

              clarithromycin will increase the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with CYP3A4 inhibitors may increase the plasma hormone concentrations. Use of a nonhormonal contraceptive is recommended.

            • loperamide

              clarithromycin will increase the level or effect of loperamide by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • losartan

              omeprazole will increase the level or effect of losartan by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor. May inhibit the conversion of losartan to its active metabolite E-3174. Importance of interaction not established; monitor individual therapeutic response to determine losartan dosage.

            • lumacaftor/ivacaftor

              lumacaftor/ivacaftor, omeprazole. affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. In vitro studies suggest that lumacaftor may induce and ivacaftor may inhibit CYP2C19 substrates. .

              clarithromycin increases levels of lumacaftor/ivacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Strong CYP3A inhibitors do not impact lumacaftor exposure, but increased ivacaftor exposure by 4.3-fold. Due to the induction effect of lumacaftor on CYP3A, at steady-state the net exposure of ivacaftor is not expected to exceed that when given in the absence of lumacaftor at a dose of 150 mg q12hr (the approved dose of ivacaftor monotherapy). Therefore, no dose adjustment is necessary when CYP3A inhibitors are initiated in patients currently taking lumacaftor/ivacaftor. However, when initiating lumacaftor/ivacaftor in patients taking strong CYP3A inhibitors, reduce the dose to 1 tablet daily (lumacaftor 200 mg/ivacaftor 125 mg total daily dose) for the first week of treatment to allow for the steady-state induction effect of lumacaftor. Following this period, continue with the recommended daily dose. No dose adjustment is required for moderate or weak CYP3A4 inhibitors.

              lumacaftor/ivacaftor will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Lumacaftor/ivacaftor is a strong CYP3A4 inhibitor and also has the potential to induce CYP2C19 and both induce and inhibitor P-gp.

            • maraviroc

              clarithromycin will increase the level or effect of maraviroc by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Decrease maraviroc dose to 150 mg BID when coadministered with strong CYP3A4 inhibitors

              clarithromycin will increase the level or effect of maraviroc by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • mestranol

              amoxicillin will decrease the level or effect of mestranol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Use Caution/Monitor.

            • methotrexate

              amoxicillin increases levels of methotrexate by decreasing renal clearance. Use Caution/Monitor. Increased serum concentrations of methotrexate with concomitant hematologic and gastrointestinal toxicity have been observed with concurrent administration of high or low doses of methotrexate and penicillins.

              omeprazole increases levels of methotrexate by decreasing renal clearance. Use Caution/Monitor. Temporary withdrawal of PPI may be considered in some patients.

            • marijuana

              clarithromycin will increase the level or effect of marijuana by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • methyclothiazide

              amoxicillin, methyclothiazide. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • medroxyprogesterone

              clarithromycin will increase the level or effect of medroxyprogesterone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • mestranol

              clarithromycin will decrease the level or effect of mestranol by altering intestinal flora. Applies only to oral forms of hormone. Low risk of contraceptive failure. Modify Therapy/Monitor Closely.

              clarithromycin will increase the level or effect of mestranol by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • methadone

              clarithromycin and methadone both increase QTc interval. Modify Therapy/Monitor Closely.

            • methylphenidate

              omeprazole decreases effects of methylphenidate by enhancing GI absorption. Applies only to oral form of both agents. Modify Therapy/Monitor Closely. Since the characteristics of methylphenidate extended release capsules (Ritalin LA) are pH dependent, coadministration of antacids or acid suppressants could alter the release of methylphenidate. Consider separating the administration of the antacid and the methylphenidate extended-release capsules may be avoided.

            • methylprednisolone

              clarithromycin will increase the level or effect of methylprednisolone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • metolazone

              amoxicillin, metolazone. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • midazolam intranasal

              omeprazole will increase the level or effect of midazolam intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of mild CYP3A4 inhibitors with midazolam intranasal may cause higher midazolam systemic exposure, which may prolong sedation.

            • mifepristone

              clarithromycin will increase the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Do not exceed mifepristone 300 mg/day for Cushing syndrome when coadministered with strong CYP3A4 inhibitors; combination may also prolong QT interval. Use alternatives if available

            • mitotane

              mitotane decreases levels of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Mitotane is a strong inducer of cytochrome P-4503A4; monitor when coadministered with CYP3A4 substrates for possible dosage adjustments.

            • modafinil

              modafinil will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • mometasone inhaled

              clarithromycin will increase the level or effect of mometasone inhaled by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increases riak for systemic corticosteroid side effects

            • mometasone, intranasal

              clarithromycin will increase the level or effect of mometasone, intranasal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • montelukast

              clarithromycin will increase the level or effect of montelukast by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • mycophenolate

              omeprazole will decrease the level or effect of mycophenolate by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor. Potential interaction applies to mycophenolate mofetil. Enteric coated mycophenolate sodium formulation is less sensitive to this interaction. Clinical significance unclear.

            • naldemedine

              clarithromycin increases levels of naldemedine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor naldemedine for potential adverse effects if coadministered with strong or moderate CYP3A4 inhibitors.

              clarithromycin increases levels of naldemedine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor naldemedine for potential adverse effects if coadministered with P-gp inhibitors.

            • nateglinide

              clarithromycin decreases levels of nateglinide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. May result in hypoglycemia; monitor glucose levels closely.

              omeprazole will increase the level or effect of nateglinide by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor.

            • nelfinavir

              clarithromycin will increase the level or effect of nelfinavir by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • ombitasvir/paritaprevir/ritonavir & dasabuvir

              ombitasvir/paritaprevir/ritonavir & dasabuvir will decrease the level or effect of omeprazole by unspecified interaction mechanism. Use Caution/Monitor. Monitor for decreased omeprazole efficacy; consider increasing omeprazole dose in patients whose symptoms are not well controlled (not to exceed 40 mg/day)

            • neomycin PO

              clarithromycin will increase the level or effect of neomycin PO by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • netupitant/palonosetron

              clarithromycin will increase the level or effect of netupitant/palonosetron by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Netupitant is mainly metabolized by CYP3A4; no dosage adjustment is required

            • nicardipine

              clarithromycin will increase the level or effect of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • nifedipine

              clarithromycin will increase the level or effect of nifedipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow; consider initiating nifedipine at the lowest dose available if given concomitantly with this medication

            • nilotinib

              clarithromycin will increase the level or effect of nilotinib by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • nimodipine

              clarithromycin will increase the level or effect of nimodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • nintedanib

              clarithromycin increases levels of nintedanib by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. If nintedanib adverse effects occur, management may require interruption, dose reduction, or discontinuation of therapy.

            • nisoldipine

              clarithromycin will increase the level or effect of nisoldipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • nitrendipine

              clarithromycin will increase the level or effect of nitrendipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • ofloxacin

              clarithromycin and ofloxacin both increase QTc interval. Modify Therapy/Monitor Closely.

            • oliceridine

              clarithromycin will increase the level or effect of oliceridine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. If concomitant use is necessary, may require less frequent oliceridine dosing. Closely monitor for respiratory depression and sedation and titrate subsequent doses accordingly. If inhibitor is discontinued, consider increase oliceridine dosage until stable drug effects are achieved. Monitor for signs of opioid withdrawal.

            • olodaterol inhaled

              clarithromycin and olodaterol inhaled both increase QTc interval. Use Caution/Monitor. Drugs that prolong the QTc interval and may potentiate the effects of beta2 agonists on the cardiovascular system; increased risk of ventricular arrhythmias

            • osilodrostat

              clarithromycin will increase the level or effect of osilodrostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce dose of osilodrostat, a CYP3A4 substrate, by half when coadministered with a strong CYP3A4 inhibitor.

              osilodrostat and clarithromycin both increase QTc interval. Use Caution/Monitor.

            • osimertinib

              osimertinib and clarithromycin both increase QTc interval. Use Caution/Monitor. Conduct periodic monitoring with ECGs and electrolytes in patients taking drugs known to prolong the QTc interval.

            • ospemifene

              clarithromycin increases levels of ospemifene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • oxaliplatin

              oxaliplatin will increase the level or effect of clarithromycin by Other (see comment). Use Caution/Monitor. Monitor for ECG changes if therapy is initiated in patients with drugs known to prolong QT interval.

            • oxcarbazepine

              oxcarbazepine will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • oxybutynin

              clarithromycin will increase the level or effect of oxybutynin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • ozanimod

              ozanimod and clarithromycin both increase QTc interval. Modify Therapy/Monitor Closely. The potential additive effects on heart rate, treatment with ozanimod should generally not be initiated in patients who are concurrently treated with QT prolonging drugs with known arrhythmogenic properties.

            • paclitaxel

              clarithromycin will increase the level or effect of paclitaxel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of paclitaxel by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • paclitaxel protein bound

              clarithromycin will increase the level or effect of paclitaxel protein bound by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of paclitaxel protein bound by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • paliperidone

              clarithromycin will increase the level or effect of paliperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              clarithromycin and paliperidone both increase QTc interval. Modify Therapy/Monitor Closely.

            • panobinostat

              clarithromycin increases levels of panobinostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce panobinostat starting dose to 10 mg if coadministered with strong CYP3A4 inhibitors.

            • pantothenic acid

              clarithromycin will decrease the level or effect of pantothenic acid by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor.

            • parecoxib

              clarithromycin will increase the level or effect of parecoxib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • paricalcitol

              clarithromycin will increase the level or effect of paricalcitol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • paromomycin

              clarithromycin will increase the level or effect of paromomycin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • paroxetine

              clarithromycin and paroxetine both increase QTc interval. Modify Therapy/Monitor Closely.

            • pasireotide

              clarithromycin and pasireotide both increase QTc interval. Modify Therapy/Monitor Closely.

            • pazopanib

              clarithromycin and pazopanib both increase QTc interval. Use Caution/Monitor.

            • pentobarbital

              pentobarbital will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • perampanel

              clarithromycin will increase the level or effect of perampanel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • phenobarbital

              phenobarbital will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • phenytoin

              omeprazole will increase the level or effect of phenytoin by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor.

              phenytoin will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • pimozide

              clarithromycin will increase the level or effect of pimozide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • pioglitazone

              clarithromycin will increase the level or effect of pioglitazone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • piperacillin

              clarithromycin decreases effects of piperacillin by pharmacodynamic antagonism. Use Caution/Monitor. bacteriostatic agents may inhibit the effects of bactericidal agents.

            • pitavastatin

              clarithromycin increases toxicity of pitavastatin by Other (see comment). Use Caution/Monitor. Comment: OATP1B1 inhibitors may increase risk of myopathy.

            • polatuzumab vedotin

              clarithromycin will increase the level or effect of polatuzumab vedotin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Polatuzumab undergoes catabolism to small peptides, amino acids, monomethyl auristatin E (MMAE), and unconjugated MMAE-related catabolites. MMAE is a CYP3A4 substrate. Coadministration of polatuzumab vedotin with a strong CYP3A4 inhibitor may increase unconjugated MMAE AUC, which may increase polatuzumab vedotin toxicities.

            • polysaccharide iron

              omeprazole will decrease the level or effect of polysaccharide iron by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • posaconazole

              clarithromycin and posaconazole both increase QTc interval. Modify Therapy/Monitor Closely.

              clarithromycin will increase the level or effect of posaconazole by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              omeprazole will decrease the level or effect of posaconazole by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

              posaconazole will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • pravastatin

              clarithromycin increases levels of pravastatin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Monitor for myopathy; do not exceed pravastatin dose of 40 mg/day when coadministered with clarithromycin .

              clarithromycin increases toxicity of pravastatin by Other (see comment). Use Caution/Monitor. Comment: OATP1B1 inhibitors may increase risk of myopathy.

            • primidone

              primidone will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

              primidone will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • praziquantel

              clarithromycin will increase the level or effect of praziquantel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • prednisolone

              clarithromycin will increase the level or effect of prednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of prednisolone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • prednisone

              clarithromycin will increase the level or effect of prednisone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              clarithromycin increases levels of prednisone by decreasing metabolism. Use Caution/Monitor. Risk of toxic steroid concentrations and altered mental status.

            • propafenone

              clarithromycin will increase the level or effect of propafenone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • pyridoxine

              clarithromycin will decrease the level or effect of pyridoxine by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor.

            • pyridoxine (Antidote)

              clarithromycin will decrease the level or effect of pyridoxine (Antidote) by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor.

            • quazepam

              clarithromycin will increase the level or effect of quazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • quetiapine

              quetiapine, clarithromycin. Either increases toxicity of the other by QTc interval. Use Caution/Monitor. Avoid use with drugs that prolong QT and in patients with risk factors for prolonged QT interval. Postmarketing cases show QT prolongation with overdose in patients with concomitant illness or with drugs known to cause electrolyte imbalance or prolong QT.

            • quinine

              clarithromycin will increase the level or effect of quinine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin and quinine both increase QTc interval. Use Caution/Monitor.

            • rabeprazole

              clarithromycin will increase the level or effect of rabeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • ranolazine

              clarithromycin and ranolazine both increase QTc interval. Modify Therapy/Monitor Closely.

            • rifabutin

              rifabutin will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • rifampin

              rifampin will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

              rifampin will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • rifaximin

              clarithromycin increases levels of rifaximin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • riociguat

              omeprazole will decrease the level or effect of riociguat by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

            • rilpivirine

              clarithromycin increases levels of rilpivirine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Where possible, alternatives such as azithromycin should be considered.

              rilpivirine increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor. Rilpivirine should be used with caution when co-administered with a drug with a known risk of Torsades de Pointes.

            • riociguat

              clarithromycin will increase the level or effect of riociguat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • ripretinib

              clarithromycin will increase the level or effect of ripretinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration with a strong CYP3A inhibitor will increase systemic exposure to ripretinib and its active metabolite (DP-5439), which may increase risk of adverse reactions.

            • risperidone

              clarithromycin will increase the level or effect of risperidone by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              clarithromycin and risperidone both increase QTc interval. Modify Therapy/Monitor Closely.

            • ritonavir

              clarithromycin will increase the level or effect of ritonavir by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              ritonavir will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • roflumilast

              omeprazole will decrease the level or effect of roflumilast by affecting hepatic enzyme CYP1A2 metabolism. Modify Therapy/Monitor Closely. Concomitant therapy may reduce therapeutic effectiveness.

            • romidepsin

              clarithromycin will increase the level or effect of romidepsin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

              clarithromycin and romidepsin both increase QTc interval. Modify Therapy/Monitor Closely.

            • rose hips

              omeprazole will decrease the level or effect of rose hips by increasing gastric pH. Applies only to oral form of both agents. Use Caution/Monitor.

              amoxicillin, rose hips. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • rosiglitazone

              clarithromycin increases levels of rosiglitazone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. May result in hypoglycemia; monitor glucose levels closely.

            • salicylates (non-asa)

              amoxicillin, salicylates (non-asa). Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

            • rucaparib

              rucaparib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Adjust dosage of CYP3A4 substrates, if clinically indicated.

            • sacubitril/valsartan

              clarithromycin will increase the level or effect of sacubitril/valsartan by Other (see comment). Use Caution/Monitor. The results from an in vitro study with human liver tissue indicate that valsartan is a substrate of the hepatic uptake transporter OATP1B1; coadministration with OATP1B1 inhibitors may increase valsartan systemic exposure

            • salmeterol

              clarithromycin will increase the level or effect of salmeterol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin and salmeterol both increase QTc interval. Use Caution/Monitor.

            • salsalate

              amoxicillin, salsalate. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

            • saquinavir

              clarithromycin will increase the level or effect of saquinavir by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • saxagliptin

              clarithromycin will increase the level or effect of saxagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Limit saxagliptin dose to 2.5 mg/day when coadministered with strong CYP3A4 inhibitors

            • secobarbital

              secobarbital will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • St John's Wort

              St John's Wort will decrease the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • selpercatinib

              selpercatinib increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor.

            • silodosin

              clarithromycin will increase the level or effect of silodosin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • sirolimus

              clarithromycin will increase the level or effect of sirolimus by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • sodium phenylacetate

              amoxicillin, sodium phenylacetate. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • sodium picosulfate/magnesium oxide/anhydrous citric acid

              clarithromycin decreases effects of sodium picosulfate/magnesium oxide/anhydrous citric acid by altering metabolism. Use Caution/Monitor. Coadministration with antibiotics decreases efficacy by altering colonic bacterial flora needed to convert sodium picosulfate to active drug.

              amoxicillin decreases effects of sodium picosulfate/magnesium oxide/anhydrous citric acid by altering metabolism. Use Caution/Monitor. Coadministration with antibiotics decreases efficacy by altering colonic bacterial flora needed to convert sodium picosulfate to active drug.

            • sofosbuvir/velpatasvir

              clarithromycin will increase the level or effect of sofosbuvir/velpatasvir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • sulfasalazine

              amoxicillin, sulfasalazine. Either increases levels of the other by plasma protein binding competition. Use Caution/Monitor.

              amoxicillin, sulfasalazine. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • sorafenib

              sorafenib and clarithromycin both increase QTc interval. Use Caution/Monitor.

            • St John's Wort

              St John's Wort will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • stiripentol

              stiripentol, clarithromycin. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Stiripentol is a CYP3A4 inhibitor and inducer. Monitor CYP3A4 substrates coadministered with stiripentol for increased or decreased effects. CYP3A4 substrates may require dosage adjustment.

              stiripentol will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Consider reducing the dose of CYP2C19 substrates, if adverse reactions are experienced when administered concomitantly with stiripentol.

              stiripentol, omeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Stiripentol is a CYP3A4 inhibitor and inducer. Monitor CYP3A4 substrates coadministered with stiripentol for increased or decreased effects. CYP3A4 substrates may require dosage adjustment.

            • streptomycin

              clarithromycin will increase the level or effect of streptomycin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • tacrolimus

              omeprazole will increase the level or effect of tacrolimus by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. Concomitant administration may increase tacrolimus whole blood concentrations, particularly in intermediate or poor metabolizers of CYP2C19

            • sufentanil

              clarithromycin will increase the level or effect of sufentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • sufentanil SL

              clarithromycin will increase the level or effect of sufentanil SL by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Coadministration of sufentanil SL with any CYP3A4 inhibitor may increase sufentanil plasma concentration, and, thereby increase or prolonged adverse effects, including potentially fatal respiratory depression.

            • sulfamethoxazole

              clarithromycin and sulfamethoxazole both increase QTc interval. Modify Therapy/Monitor Closely.

            • tacrolimus

              clarithromycin will increase the level or effect of tacrolimus by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • tacrolimus ointment

              clarithromycin will increase the level or effect of tacrolimus ointment by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • tamoxifen

              omeprazole will increase the level or effect of tamoxifen by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor.

              clarithromycin, tamoxifen. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. CYP3A4 inhibition decreases metabolism of tamoxifen to N-desmethyl tamoxifen (active metabolite with similar biologic activity).

            • tasimelteon

              clarithromycin will increase the level or effect of tasimelteon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • tazemetostat

              tazemetostat will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              omeprazole will increase the level or effect of tazemetostat by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • tazemetostat

              tazemetostat will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • tecovirimat

              tecovirimat will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Tecovirimat is a weak CYP3A4 inducer. Monitor sensitive CYP3A4 substrates for effectiveness if coadministered.

            • telavancin

              clarithromycin and telavancin both increase QTc interval. Modify Therapy/Monitor Closely.

            • teniposide

              clarithromycin will increase the level or effect of teniposide by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • terbinafine

              clarithromycin will increase the level or effect of terbinafine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • tezacaftor

              clarithromycin will increase the level or effect of tezacaftor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Adjust tezacaftor dosage regimen if coadministered with a strong CYP3A inhibitor.

            • thiamine

              clarithromycin will decrease the level or effect of thiamine by altering intestinal flora. Applies only to oral form of both agents. Use Caution/Monitor.

            • ticagrelor

              clarithromycin increases levels of ticagrelor by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Ticagrelor is metabolized by CYP3A4/5. Avoid use with strong CYP3A inhibitors.

            • tinidazole

              clarithromycin will increase the level or effect of tinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              omeprazole will increase the level or effect of tinidazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • tisotumab vedotin

              clarithromycin increases levels of tisotumab vedotin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Tisotumab vedotin?s active metabolite (MMAE) is a CYP3A4 substrate. Coadministration with strong CYP3A4 inhibitors may increase unconjugated MMAE systemic exposure and increase risk of adverse effects.

            • tofacitinib

              omeprazole increases levels of tofacitinib by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor. No specific dose adjustment recommended when tofacitinib coadministered with potent CYP2C19 inhibitors; decrease tofacitinib dose if coadministered with both moderate CYP3A4 and potent CYP2C19 inhibitors .

            • tobramycin

              clarithromycin will increase the level or effect of tobramycin by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • tolazamide

              clarithromycin increases levels of tolazamide by plasma protein binding competition. Use Caution/Monitor. Risk of hypoglycemia.

            • tolbutamide

              clarithromycin increases levels of tolbutamide by plasma protein binding competition. Use Caution/Monitor. Risk of hypoglycemia.

            • tolvaptan

              clarithromycin will increase the level or effect of tolvaptan by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • tramadol

              clarithromycin will increase the level or effect of tramadol by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • triclabendazole

              triclabendazole will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • trimethoprim

              clarithromycin and trimethoprim both increase QTc interval. Modify Therapy/Monitor Closely.

            • trimipramine

              clarithromycin will increase the level or effect of trimipramine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • triptorelin

              triptorelin increases toxicity of clarithromycin by QTc interval. Use Caution/Monitor. Increases risk of torsades de pointes.

            • tropisetron

              clarithromycin and tropisetron both increase QTc interval. Modify Therapy/Monitor Closely.

            • ulipristal

              clarithromycin will increase the level or effect of ulipristal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • umeclidinium bromide/vilanterol inhaled

              clarithromycin will increase the level or effect of umeclidinium bromide/vilanterol inhaled by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Vilanterol is a CYP3A4 substrate; coadministration with potent CYP3A4 inhibitors may increase systemic exposure

            • upadacitinib

              clarithromycin will increase the level or effect of upadacitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Caution if upadacitinib is coadministered with strong CYP3A4 inhibitors.

            • valbenazine

              clarithromycin will increase the level or effect of valbenazine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Reduce valbenazine dose to 40 mg once daily when coadministered with a strong CYP3A4 inhibitor.

            • valsartan

              clarithromycin will increase the level or effect of valsartan by Other (see comment). Use Caution/Monitor. The results from an in vitro study with human liver tissue indicate that valsartan is a substrate of the hepatic uptake transporter OATP1B1; coadministration with OATP1B1 inhibitors may increase valsartan systemic exposure

            • velpatasvir

              clarithromycin will increase the level or effect of velpatasvir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • venlafaxine

              clarithromycin and venlafaxine both increase QTc interval. Modify Therapy/Monitor Closely.

            • verapamil

              clarithromycin will increase the level or effect of verapamil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased effect of calcium channel blockers may lead to hypotension, edema, decreased HR, and acute kidney injury due to reduced renal blood flow

            • vilanterol/fluticasone furoate inhaled

              clarithromycin will increase the level or effect of vilanterol/fluticasone furoate inhaled by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Fluticasone furoate and vilanterol are both CYP3A4 substrates; coadministration with potent CYP3A4 inhibitors may increase systemic exposure

            • vinblastine

              clarithromycin will increase the level or effect of vinblastine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of vinblastine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • vincristine

              clarithromycin will increase the level or effect of vincristine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of vincristine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • vincristine liposomal

              clarithromycin will increase the level or effect of vincristine liposomal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin will increase the level or effect of vincristine liposomal by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor.

            • vinorelbine

              clarithromycin will increase the level or effect of vinorelbine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • vismodegib

              omeprazole will decrease the level or effect of vismodegib by Other (see comment). Use Caution/Monitor. Drugs that increase gastric pH alter vismodegib solubility and therefore reduce bioavailability; effect on efficacy unknown

            • voclosporin

              voclosporin, clarithromycin. Either increases effects of the other by QTc interval. Use Caution/Monitor.

            • voriconazole

              voriconazole will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

              clarithromycin and voriconazole both increase QTc interval. Modify Therapy/Monitor Closely.

              voriconazole will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C19 metabolism. Use Caution/Monitor.

            • warfarin

              amoxicillin increases effects of warfarin by Other (see comment). Use Caution/Monitor. Comment: Amoxicillin may enhance anticoagulant effect of vitamin K antagonists.

              omeprazole will increase the level or effect of warfarin by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor.

              clarithromycin increases toxicity of warfarin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Increased risk of hemorrage; monitor INR and prothrombin times frequently.

            • willow bark

              amoxicillin, willow bark. Either increases levels of the other by decreasing renal clearance. Use Caution/Monitor.

            • zidovudine

              clarithromycin increases toxicity of zidovudine by unknown mechanism. Use Caution/Monitor. Increased risk of myelosuppression.

              clarithromycin, zidovudine. Mechanism: unknown. Use Caution/Monitor. Clarithromycin may increase or decrease levels of zidovudine. Literature describes conflicting reports. Separate administration by minimum 2 to 4 hours. .

            • ziprasidone

              clarithromycin will increase the level or effect of ziprasidone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            Minor (109)

            • aliskiren

              clarithromycin will increase the level or effect of aliskiren by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              clarithromycin will increase the level or effect of aliskiren by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

            • alosetron

              omeprazole will decrease the level or effect of alosetron by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

            • alprazolam

              omeprazole increases levels of alprazolam by decreasing metabolism. Minor/Significance Unknown.

            • alvimopan

              clarithromycin will increase the level or effect of alvimopan by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

            • ambrisentan

              clarithromycin will increase the level or effect of ambrisentan by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

              clarithromycin will increase the level or effect of ambrisentan by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              omeprazole will increase the level or effect of ambrisentan by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.

            • amiloride

              amiloride decreases levels of amoxicillin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown. Administer each drug at least 2 hours apart from each other; monitor for reduced antibiotic efficacy.

            • amobarbital

              amobarbital will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              amobarbital decreases levels of clarithromycin by increasing elimination. Minor/Significance Unknown.

            • azithromycin

              azithromycin decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • aztreonam

              aztreonam, amoxicillin. Either increases effects of the other by pharmacodynamic synergism. Minor/Significance Unknown. Combination may be used synergistically against Enterobacteriaceae.

            • bismuth subsalicylate

              omeprazole increases levels of bismuth subsalicylate by enhancing GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.

            • amoxicillin

              clarithromycin decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • ampicillin

              clarithromycin decreases effects of ampicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • apixaban

              clarithromycin will increase the level or effect of apixaban by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. Although clarithromycin is a combined P-gp and strong CYP3A4 inhibitor, the manufacturer has stated that pharmacokinetic data suggest that no dose adjustment is necessary with concomitant administration

            • aprepitant

              aprepitant will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • armodafinil

              armodafinil will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              clarithromycin will increase the level or effect of armodafinil by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

            • artemether/lumefantrine

              artemether/lumefantrine will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • atazanavir

              atazanavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • blessed thistle

              blessed thistle decreases effects of omeprazole by pharmacodynamic antagonism. Minor/Significance Unknown. Theoretical interaction.

            • bosentan

              omeprazole will increase the level or effect of bosentan by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown.

              bosentan will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              bosentan will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • budesonide

              budesonide will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • carbamazepine

              omeprazole increases levels of carbamazepine by decreasing metabolism. Minor/Significance Unknown. Monitor plasma levels when used concomitantly.

            • butabarbital

              butabarbital will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              butabarbital decreases levels of clarithromycin by increasing elimination. Minor/Significance Unknown.

            • butalbital

              butalbital will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              butalbital decreases levels of clarithromycin by increasing elimination. Minor/Significance Unknown.

            • carvedilol

              omeprazole will increase the level or effect of carvedilol by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown.

            • chloramphenicol

              chloramphenicol decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • chlordiazepoxide

              omeprazole increases levels of chlordiazepoxide by decreasing metabolism. Minor/Significance Unknown.

            • chlorpropamide

              clarithromycin increases levels of chlorpropamide by unknown mechanism. Minor/Significance Unknown. Risk of hepatotoxicity.

            • clarithromycin

              clarithromycin decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • clomipramine

              omeprazole will increase the level or effect of clomipramine by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.

            • clonazepam

              omeprazole increases levels of clonazepam by decreasing metabolism. Minor/Significance Unknown.

            • clorazepate

              omeprazole increases levels of clorazepate by decreasing metabolism. Minor/Significance Unknown.

            • conivaptan

              conivaptan will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • cortisone

              cortisone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • cyanocobalamin

              omeprazole decreases levels of cyanocobalamin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.

            • cyclosporine

              cyclosporine will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • darifenacin

              darifenacin will decrease the level or effect of omeprazole by Other (see comment). Minor/Significance Unknown. Effectiveness of proton pump inhibitors may be decreased theoretically if administered with other antisecretory agents

              darifenacin will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • darunavir

              darunavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • devil's claw

              devil's claw decreases effects of omeprazole by pharmacodynamic antagonism. Minor/Significance Unknown.

            • dasatinib

              dasatinib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • dexamethasone

              dexamethasone will decrease the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              dexamethasone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • DHEA, herbal

              DHEA, herbal will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • diazepam

              omeprazole will increase the level or effect of diazepam by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.

            • dicloxacillin

              clarithromycin decreases effects of dicloxacillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • dronedarone

              dronedarone will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              dronedarone will increase the level or effect of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • efavirenz

              efavirenz will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • elvitegravir/cobicistat/emtricitabine/tenofovir DF

              elvitegravir/cobicistat/emtricitabine/tenofovir DF, omeprazole. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. Based on drug interaction studies conducted with the components of Stribild, no clinically significant drug interactions have been either observed or are expected when coadministered with PPIs.

            • erythromycin base

              erythromycin base decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • erythromycin ethylsuccinate

              erythromycin ethylsuccinate decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • erythromycin lactobionate

              erythromycin lactobionate decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • erythromycin stearate

              erythromycin stearate decreases effects of amoxicillin by pharmacodynamic antagonism. Minor/Significance Unknown.

            • eslicarbazepine acetate

              eslicarbazepine acetate will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              eslicarbazepine acetate decreases effects of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. Monitor for GI symptoms; net increased or decreased effect on PPI action unclear due to opposing CYP450 actions.

            • estazolam

              omeprazole increases levels of estazolam by decreasing metabolism. Minor/Significance Unknown.

            • ethinylestradiol

              ethinylestradiol will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • etravirine

              omeprazole will increase the level or effect of etravirine by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.

              etravirine will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              omeprazole will increase the level or effect of etravirine by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown.

            • ferric carboxymaltose

              omeprazole will decrease the level or effect of ferric carboxymaltose by increasing gastric pH. Applies only to oral form of both agents. Minor/Significance Unknown.

            • fexofenadine

              clarithromycin will increase the level or effect of fexofenadine by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

            • fluconazole

              fluconazole will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • fludrocortisone

              fludrocortisone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • fluoxetine

              fluoxetine will increase the level or effect of omeprazole by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown.

            • flurazepam

              omeprazole increases levels of flurazepam by decreasing metabolism. Minor/Significance Unknown.

            • fluvastatin

              omeprazole will increase the level or effect of fluvastatin by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown.

            • fosamprenavir

              fosamprenavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • fosphenytoin

              fosphenytoin will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • glipizide

              omeprazole will increase the level or effect of glipizide by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.

            • grapefruit

              grapefruit will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • griseofulvin

              griseofulvin will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • hydrocortisone

              hydrocortisone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • ibuprofen IV

              omeprazole will increase the level or effect of ibuprofen IV by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown.

            • indinavir

              indinavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • ixazomib

              clarithromycin, ixazomib. affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. In clinical trials, coadministration of ixazomib with strong CYP3A inhibitors did not result in a clinically meaningful change in the systemic exposure of ixazomib.

            • lapatinib

              lapatinib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • levothyroxine

              omeprazole decreases levels of levothyroxine by increasing gastric pH. Applies only to oral form of both agents. Minor/Significance Unknown. Conflicting evidence regarding this interaction exists.

            • lidocaine

              omeprazole will decrease the level or effect of lidocaine by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

            • liothyronine

              omeprazole decreases levels of liothyronine by increasing gastric pH. Applies only to oral form of both agents. Minor/Significance Unknown. Conflicting evidence regarding this interaction exists.

            • liotrix

              omeprazole decreases levels of liotrix by increasing gastric pH. Applies only to oral form of both agents. Minor/Significance Unknown. Conflicting evidence regarding this interaction exists.

            • lisdexamfetamine

              omeprazole, lisdexamfetamine. Other (see comment). Minor/Significance Unknown. Comment: Reduced gastric acidity caused by proton pump inhibitors decreases time to Tmax for amphetamine and dextroamphetamine. AUC was unaffected. .

            • loratadine

              clarithromycin will increase the level or effect of loratadine by P-glycoprotein (MDR1) efflux transporter. Minor/Significance Unknown.

            • lorazepam

              omeprazole increases levels of lorazepam by decreasing metabolism. Minor/Significance Unknown.

            • lumefantrine

              lumefantrine will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • marijuana

              marijuana will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • methamphetamine

              omeprazole decreases levels of methamphetamine by Other (see comment). Minor/Significance Unknown. Comment: Time to maximum concentration (Tmax) of amphetamine is decreased compared to when administered alone; monitor patients for changes in clinical effect and adjust therapy based on clinical response.

            • methylprednisolone

              methylprednisolone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              clarithromycin increases levels of methylprednisolone by decreasing metabolism. Minor/Significance Unknown.

            • metronidazole

              metronidazole will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • mexiletine

              omeprazole will decrease the level or effect of mexiletine by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

            • miconazole vaginal

              miconazole vaginal will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • midazolam

              omeprazole increases levels of midazolam by decreasing metabolism. Minor/Significance Unknown.

            • mitotane

              mitotane decreases levels of omeprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. Mitotane is a strong inducer of cytochrome P-4503A4; monitor when coadministered with CYP3A4 substrates for possible dosage adjustments.

            • modafinil

              modafinil will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • nafcillin

              clarithromycin decreases effects of nafcillin by pharmacodynamic antagonism. Minor/Significance Unknown. bacteriostatic antibiotics may interfere with the bactericidal actions of penicillins.

            • nelfinavir

              nelfinavir will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • nevirapine

              nevirapine will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • nifedipine

              nifedipine will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • nilotinib

              nilotinib will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • olanzapine

              omeprazole will decrease the level or effect of olanzapine by affecting hepatic enzyme CYP1A2 metabolism. Minor/Significance Unknown.

            • ospemifene

              omeprazole increases levels of ospemifene by affecting hepatic enzyme CYP2C19 metabolism. Minor/Significance Unknown.

            • oxacillin

              clarithromycin decreases effects of oxacillin by pharmacodynamic antagonism. Minor/Significance Unknown. bacteriostatic agents may inhibit the effects of bactericidal agents.

            • oxcarbazepine

              oxcarbazepine will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • penicillin G aqueous

              clarithromycin decreases effects of penicillin G aqueous by pharmacodynamic antagonism. Minor/Significance Unknown.

            • penicillin VK

              clarithromycin decreases effects of penicillin VK by pharmacodynamic antagonism. Minor/Significance Unknown.

            • pentobarbital

              pentobarbital will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              pentobarbital decreases levels of clarithromycin by increasing elimination. Minor/Significance Unknown.

            • phenobarbital

              phenobarbital will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              phenobarbital decreases levels of clarithromycin by increasing elimination. Minor/Significance Unknown.

            • phenytoin

              phenytoin will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • phytoestrogens

              omeprazole decreases levels of phytoestrogens by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.

            • pivmecillinam

              clarithromycin decreases effects of pivmecillinam by pharmacodynamic antagonism. Minor/Significance Unknown.

            • posaconazole

              posaconazole will increase the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • prednisone

              prednisone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • primidone

              primidone will decrease the level or effect of clarithromycin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

              primidone decreases levels of clarithromycin by increasing elimination. Minor/Significance Unknown.

            • pyridoxine (Antidote)

              amoxicillin will decrease the level or effect of pyridoxine (Antidote) by altering intestinal flora. Applies only to oral form of both agents. Minor/Significance Unknown.

            • quazepam

              omeprazole increases levels of quazepam by decreasing metabolism. Minor/Significance Unknown.

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            Adverse Effects

            >10%

            Clarithromycin

            • GI effects, general (13%)

            1-10%

            Clarithromycin

            • Headache (2%)
            • Abdominal pain (2%)
            • Abnormal taste (3-7%)
            • Diarrhea (3-6%)
            • Dyspepsia (2%)
            • Heartburn (2%)
            • Nausea (3-6%)
            • Increased BUN (4%)
            • Increased PT (1%)
            • Vomiting (1%)
            • GI intolerance
            • Decrease WBC Rash

            Omeprazole

            • Acid regurgitation (1.9%)
            • Upper respiratory infection (1.9%)
            • Constipation (1.5%)
            • Dizziness (1.5%)
            • Rash (1.5%)
            • Asthenia (1.3%)
            • Back pain (1.1%)
            • Cough (1.1%)

            <1%

            Clarithromycin

            • QT prolongation
            • Neurology/Psychiatric: Anxiety, dizziness, hallucinations, manic behavior, neuromuscular blockade, psychosis, seizures
            • Gastrointestinal: Anorexia, glossitis, pancreatitis, jaundice, hepatitis/hepatic dysfunction, C difficile colitis
            • Laboratory: Bilirubin increased, elevated AST, LFTs, alkaline phosphate, serum creatinine; hypoglycemia, leukopenia, neutropenia, thrombocytopenia
            • Anaphylaxis, dyspnea, Stevens-Johnson syndrome

            Frequency Not Defined

            Omeprazole

            • Fracture of bone, osteoporosis-related
            • Hepatotoxicity (rare)
            • Hip fracture
            • Interstitial nephritis (rare)
            • Pancreatitis (rare)
            • Rhabdomyolysis
            • Toxic epidermal necrolysis (rare)

            Amoxicillin

            • Headache
            • Rash
            • Diarrhea, nausea, vomiting
            • Anemia
            • AST/ALT elevation
            • Anaphylaxis
            • Candidiasis (mucocutaneous), pseudomembranous colitis, serum sickness

            Clarithromycin

            • Torsade de pointes (rare)
            • Allergic reactions: urticaria & skin eruptions, leukocytoclastic vasculitis, toxic epidermal necrolysis, pruritus, rash
            • Transient CNS effects: psychosis, anxiety, behavioral changes, confusional states, depersonalization, disorientation, hallucinations, insomnia, nightmares, tinnitus, tremor, and vertigo
            • Hepatic failure
            • Stomatitis
            • Acute renal failure
            • Reversible hearing loss (hypoacusis)

            Postmarketing Reports

            Acute tubulointerstitial nephritis

            See individual drug monographs for more information

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            Warnings

            Contraindications

            Coadministration with pimozide, ergotamine or dihydroergotamine

            Omeprazole

            • • Hypersensitivity to omeprazole, benzimidazoles or other proton pump inhibitors

            Amoxicillin

            • Allergy to penicillins, cephalosporins, imipenem
            • Infectious mononucleosis (relative)
            • Concomitant live bacterial vaccines

            Clarithromycin

            • Clarithromycin/ranitidine bicitrate contraindicated in: severe renal impairment (CrCl<25 mL/min); history of acute porphyria

            Cautions

            Omeprazole

            • Liver disease may require dosage reduction
            • Published observational studies suggest that proton pump inhibitor (PPI) therapy may be associated with an increased risk for osteoporosis-related fractures of the hip, wrist, or spine; particularly with prolonged (>1 yr), high-dose therapy
            • Hypomagnesemia may occur with prolonged use (ie, >1 year); adverse effects may result and include tetany, arrhythmias, or seizures; in 25% of cases reviewed, magnesium supplementation alone did not improve low serum magnesium levels and the PPI had to be discontinued
            • PPIs possibly associated with increased incidence of Clostridium difficile-associated diarrhea (CDAD); consider diagnosis of CDAD for patients taking PPIs with diarrhea that does not improve
            • Cutaneous lupus erythematosus (CLE) and systemic lupus erythematosus (SLE) reported with PPIs; avoid using for longer than medically indicated; discontinue if signs or symptoms consistent with CLE or SLE are observed and refer patient to specialist
            • Symptomatic response does not preclude concomitant underlying malignancy
            • Acute tubulointerstitial nephritis (TIN) reported in patients taking PPIs; TIN may occur at any point during PPI therapy; patients may present with varying signs and symptoms from symptomatic hypersensitivity reactions, to non-specific symptoms of decreased renal function (eg, malaise, nausea, anorexia); in reported case series, some patients were diagnosed on biopsy and in the absence of extra-renal manifestations (eg, fever, rash or arthralgia); discontinue drug and evaluate patients with suspected acute TIN
            • Concomitant use with colchicine has resulted in deaths, especially in elderly with renal insufficiency; monitor patients for clinical symptoms of colchicine toxicity

            Amoxicillin

            • Allergy to cephalosporins, carbapenems
            • Endocarditis prophylaxis: use only for high risk patients, per recent AHA Guidelines
            • High doses may cause false urine glucose test by some methods

            Clarithromycin

            • Severe renal impairment
            • Do not refrigerate oral solution
            • Endocarditis prophylaxis: use only for high risk patients, per recent AHA Guidelines
            • Exacerbation of symptoms of myasthenia gravis and new onset of symptoms reported with clarithromycin; monitor patients for symptoms
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            Pregnancy & Lactation

            Pregnancy

            Based on findings in animal studies for omeprazole and clarithromycin during pregnancy may cause fetal harm; therapy is not recommended for use in pregnant women except in clinical circumstances where no alternative therapy is appropriate; Ii therapy is administered during pregnancy, or if pregnancy occurs while receiving therapy, the patient should be apprised of the potential hazard to fetus; there are no adequate and well controlled studies of omeprazole, clarithromycin, or amoxicillin (used separately or together) in pregnant women

            Animal data

            • Clarithromycin demonstrated adverse developmental effects in four animal species at clinically relevant doses; omeprazole increased embryo-fetal loss in rabbits, but animal studies and multiple human studies do not show an increased risk for major malformations; there was no evidence of harm to fetus in mice and rats due to amoxicillin

            Lactation

            Based on limited human data, clarithromycin and its active metabolite 14-OH clarithromycin are present in human milk at less than 2% of maternal weight-adjusted dose; in a separate observational study, reported adverse effects on breast-fed children (rash, diarrhea, loss of appetite, somnolence) were comparable to amoxicillin

            No data are available to assess effects of clarithromycin or 14-OH clarithromycin on milk production

            Limited data from a single case report suggest omeprazole may be present in human milk; there are no clinical data on effects of omeprazole on breastfed infant or on milk production

            Data from a published clinical lactation study indicate that amoxicillin is present in human milk; published adverse effects with amoxicillin exposure in breast-fed infant include diarrhea; there are no data on effects of amoxicillin on milk production

            Development and health benefits of breastfeeding should be considered along with mother’s clinical need for omeprazole or clarithromycin or amoxicillin and any potential adverse effects on breast-fed child from clarithromycin or from underlying maternal condition.

            Pregnancy Categories

            A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.

            B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk.

            C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done.

            D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk.

            X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist.

            NA: Information not available.

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            Pharmacology

            Mechanism of Action

            Omeprazole

            • Proton pump inhibitor; binds to H+/K+-exchange ATPase (proton pump) in gastric parietal cells resulting in blocking acid secretion

            Amoxicillin

            • Ampicillin derivative; elicits antibacterial effect by inhibiting biosynthesis of cell wall mucopeptide

            Clarithromycin

            • Semisynthetic macrolide antibiotic that reversibly binds to P site of 50S ribosomal subunit of susceptible organisms and may inhibit RNA-dependent protein synthesis by stimulating dissociation of peptidyl t-RNA from ribosomes, causing bacterial growth inhibition

            Pharmacokinetics

            Omeprazole

            • Half-Life: 0.5-1 hr; increases to 3 hr with hepatic impairment
            • Bioavailability: 30-40%
            • Peak Plasma Time: 0.5-3.5 hr
            • Protein Bound: 95-96%
            • Total Body Clearance: 500-600 mL/min
            • Metabolism: hepatic
            • Excretion: 77% urine; 16-19% feces (mainly in bile)

            Amoxicillin

            • Half-Life: 1.5 hr
            • Absorption: 74-92%
            • Distribution: most body fluids and bone, CSF<1%
            • Peak Plasma Time: 1-2 hr
            • Protein Bound: 17-20%
            • Metabolism: hepatic
            • Excretion: urine

            Clarithromycin

            • Half-Life: 3-7 hr
            • Peak Plasma Time: 2-4 hr
            • Absorption: highly stable in presence of gastric acid (unlike erythromycin); food delays but does not affect extent of absorption
            • Distribution: widely into most body tissues except CNS Metabolism: partially hepatic (P450 enzyme CYP3A4); converted to 14-OH clarithromycin (active metabolite)
            • Renal Clearance: approximates normal GFR
            • Excretion: primarily urine
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            Patient Handout

            A Patient Handout is not currently available for this monograph.
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            Formulary

            FormularyPatient Discounts

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            Tier Description
            1 This drug is available at the lowest co-pay. Most commonly, these are generic drugs.
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            Medscape prescription drug monographs are based on FDA-approved labeling information, unless otherwise noted, combined with additional data derived from primary medical literature.