colchicine/probenecid (Rx)

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Dosing & Uses

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Dosing Forms & Strengths

colchicine/probenecid

tablet

  • 0.5mg/500mg

Chronic Gouty Arthritis

Indicated for treatment of chronic gouty arthritis when complicated by frequent, recurrent acute attacks of gout

1 tablet (0.5 mg/500 mg) PO qDay for 1 week, then increase to 1 tablet BID thereafter

May be increased by 1 tablet q4wk within tolerance (and usually not above 4 tablets/day) if symptoms not controlled or the 24 hour uric acid excretion is <700 mg

Renal Impairment

Dosage requirements may be increased with renal impairment

CrCl <30 mL/min: Probenecid not effective with low urine output

Dosing Considerations

Do not start until an acute gouty attack has subsided; however, if an acute attack is precipitated during therapy, colchicine/probenecid may be continued without changing the dosage, and additional colchicine or other appropriate therapy should be given to control the acute attack

Gastric intolerance may be indicative of overdosage, and may be corrected by decreasing the dosage

As uric acid tends to crystallize out of an acid urine, a liberal fluid intake is recommended and sodium bicarbonate (3-7.5 g/day) or potassium citrate (7.5 g/day) to maintain an alkaline urine

Safety and efficacy not established

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Interactions

Interaction Checker

and colchicine/probenecid

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            Contraindicated (2)

            • nirmatrelvir

              nirmatrelvir will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Nirmatrelvir/ritonavir is contraindicated with drugs that are highly dependent on CYP3A for clearance and for which elevated concentrations are associated with serious and/or life-threatening reactions.

            • nirmatrelvir/ritonavir

              nirmatrelvir/ritonavir will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. Nirmatrelvir/ritonavir is contraindicated with drugs that are highly dependent on CYP3A for clearance and for which elevated concentrations are associated with serious and/or life-threatening reactions.

            Serious - Use Alternative (96)

            • abametapir

              abametapir will increase the level or effect of colchicine 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.

            • amiodarone

              amiodarone will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • apalutamide

              apalutamide will decrease the level or effect of colchicine 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.

            • aprepitant

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

            • aspirin

              aspirin decreases effects of probenecid by acidic (anionic) drug competition for renal tubular clearance. Avoid or Use Alternate Drug. Aspirin decreases uricosuric action of probenecid.

            • aspirin rectal

              aspirin rectal decreases effects of probenecid by acidic (anionic) drug competition for renal tubular clearance. Avoid or Use Alternate Drug. Aspirin decreases uricosuric action of probenecid.

            • aspirin/citric acid/sodium bicarbonate

              aspirin/citric acid/sodium bicarbonate decreases effects of probenecid by acidic (anionic) drug competition for renal tubular clearance. Avoid or Use Alternate Drug. Aspirin decreases uricosuric action of probenecid.

            • atazanavir

              atazanavir will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • atorvastatin

              colchicine, atorvastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • azithromycin

              azithromycin will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • baricitinib

              probenecid will increase the level or effect of baricitinib by decreasing elimination. Avoid or Use Alternate Drug. Coadministration of baricitinib with strong organic anion transporter 3 (OAT3) inhibitors is not recommended.

            • bremelanotide

              bremelanotide will decrease the level or effect of colchicine by Other (see comment). Avoid or Use Alternate Drug. Bremelanotide may slow gastric emptying and potentially reduces the rate and extent of absorption of concomitantly administered oral medications. Avoid use when taking any oral drug that is dependent on threshold concentrations for efficacy. Interactions listed are representative examples and do not include all possible clinical examples.

            • brigatinib

              brigatinib will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Brigatinib induces CYP3A4 in vitro. Coadministration with CYP3A4 substrates, particularly those with a narrow therapeutic index, can result in decreased concentrations and loss of efficacy. If unable to avoid coadministration, monitor CYP3A4 substrate levels and adjust dose as needed.

            • carbamazepine

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

            • carvedilol

              carvedilol will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • chloramphenicol

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

            • ciprofibrate

              colchicine, ciprofibrate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • clarithromycin

              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.

            • conivaptan

              conivaptan will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • cyclosporine

              cyclosporine 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.

            • darunavir

              darunavir will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • dasatinib

              dasatinib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • deferiprone

              deferiprone, colchicine. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Avoid use of deferiprone with other drugs known to be associated with neutropenia or agranulocytosis; if an alternative is not possible, monitor absolute neutrophil count more frequently.

            • digoxin

              colchicine, digoxin. Either increases toxicity of the other by unspecified interaction mechanism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis.

            • diltiazem

              diltiazem 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.

            • dronedarone

              dronedarone 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.

            • eliglustat

              eliglustat increases levels of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment. .

            • erdafitinib

              erdafitinib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If coadministration unavoidable, separate administration by at least 6 hr before or after administration of P-gp substrates with narrow therapeutic index.

            • erythromycin base

              erythromycin base 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.

            • erythromycin ethylsuccinate

              erythromycin ethylsuccinate 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.

            • erythromycin lactobionate

              erythromycin lactobionate 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.

            • erythromycin stearate

              erythromycin stearate 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.

            • fenofibrate

              colchicine, fenofibrate. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • fenofibrate micronized

              colchicine, fenofibrate micronized. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • fenofibric acid

              colchicine, fenofibric acid. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • fexinidazole

              fexinidazole will increase the level or effect of colchicine 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.

            • flibanserin

              flibanserin increases levels of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment. .

            • fluconazole

              fluconazole will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • fluvastatin

              colchicine, fluvastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • fluvoxamine

              fluvoxamine 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.

            • fosamprenavir

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

            • fostamatinib

              fostamatinib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • gemfibrozil

              colchicine, gemfibrozil. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • glecaprevir/pibrentasvir

              glecaprevir/pibrentasvir will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • grapefruit

              grapefruit will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • idelalisib

              idelalisib will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • imipenem/cilastatin

              probenecid increases levels of imipenem/cilastatin by decreasing renal clearance. Avoid or Use Alternate Drug. Coadministration increases the plasma level and half-life of imipenem.

            • imipenem/cilastatin/relebactam

              probenecid increases levels of imipenem/cilastatin/relebactam by decreasing renal clearance. Avoid or Use Alternate Drug. Coadministration increases the plasma level and half-life of imipenem.

            • indinavir

              indinavir will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

              indinavir 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.

            • itraconazole

              itraconazole will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

              itraconazole 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.

            • ivacaftor

              ivacaftor increases levels of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment. .

            • ivosidenib

              ivosidenib will decrease the level or effect of colchicine 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.

            • ketoconazole

              ketoconazole 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.

            • ketorolac

              probenecid increases levels of ketorolac by decreasing renal clearance. Contraindicated.

            • ketorolac intranasal

              probenecid increases levels of ketorolac intranasal by decreasing renal clearance. Contraindicated.

            • lapatinib

              lapatinib 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.

            • lasmiditan

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

            • ledipasvir/sofosbuvir

              ledipasvir/sofosbuvir will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • levoketoconazole

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

              levoketoconazole 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.

            • lonafarnib

              lonafarnib will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid coadministration with sensitive CYP3A substrates. If coadministration unavoidable, monitor for adverse reactions and reduce CYP3A substrate dose in accordance with product labeling.

            • lopinavir

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

            • lovastatin

              colchicine, lovastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • lumacaftor/ivacaftor

              lumacaftor/ivacaftor will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Lumacaftor is a strong inducer of CYP3A. Avoid coadministration with sensitive CYP3A substrates or CYP3A substrates with a narrow therapeutic index.

            • meropenem/vaborbactam

              probenecid increases levels of meropenem/vaborbactam by decreasing elimination. Avoid or Use Alternate Drug. Probenecid competes withe meropenem for active tubular secretion.

            • methotrexate

              probenecid increases levels of methotrexate by acidic (anionic) drug competition for renal tubular clearance. Avoid or Use Alternate Drug. If combination must be used, decrease methotrexate dose; also, methotrexate increases uric acid production and risk for uric acid neuropathy.

            • mifepristone

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

            • mobocertinib

              mobocertinib will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. If use is unavoidable, increase CYP3A4 substrate dosage in accordance with its prescribing information.

            • nafcillin

              nafcillin, probenecid. Either increases levels of the other by decreasing renal clearance. Avoid or Use Alternate Drug.

            • nefazodone

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

            • nelfinavir

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

            • neratinib

              neratinib increases levels of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment. .

            • ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC)

              ombitasvir/paritaprevir/ritonavir & dasabuvir (DSC) 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.

            • pacritinib

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

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

            • pitavastatin

              colchicine, pitavastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • pivmecillinam

              pivmecillinam, probenecid. Either increases levels of the other by decreasing renal clearance. Avoid or Use Alternate Drug.

            • posaconazole

              posaconazole will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Avoid use of colchicine with 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.

            • pravastatin

              colchicine, pravastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • quinidine

              quinidine will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • quinine

              quinine will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • ranolazine

              ranolazine will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • ribociclib

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

            • rifabutin

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

            • rifampin

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

            • ritonavir

              ritonavir 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.

            • rolapitant

              rolapitant will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • ropeginterferon alfa 2b

              ropeginterferon alfa 2b, colchicine. Either increases toxicity of the other by Other (see comment). Avoid or Use Alternate Drug. Comment: Myelosuppressive agents can produce additive myelosuppression. Avoid use and monitor patients receiving the combination for effects of excessive myelosuppression.

            • rosuvastatin

              colchicine, rosuvastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • saquinavir

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

            • selinexor

              colchicine, selinexor. unspecified interaction mechanism. Avoid or Use Alternate Drug. Patients treated with selinexor may experience neurological toxicities. Avoid taking selinexor with other medications that may cause dizziness or confusion.

            • simvastatin

              colchicine, simvastatin. Either increases toxicity of the other by pharmacodynamic synergism. Avoid or Use Alternate Drug. Increased risk of rhabdomyolysis (incl a fatality).

            • sofosbuvir/velpatasvir

              sofosbuvir/velpatasvir will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. Avoid use of colchicine with P-gp inhibitors. If coadministration is necessary, decrease colchicine dose or frequency as recommended in prescribing information. Use of any colchicine product in conjunction with P-gp inhibitors is contraindicated in patients with renal or hepatic impairment.

            • sotorasib

              sotorasib will decrease the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If use is unavoidable, refer to the prescribing information of the P-gp substrate for dosage modifications.

            • temocillin

              temocillin, probenecid. Either increases levels of the other by decreasing renal clearance. Avoid or Use Alternate Drug.

            • tepotinib

              tepotinib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Avoid or Use Alternate Drug. If concomitant use unavoidable, reduce the P-gp substrate dosage if recommended in its approved product labeling.

            • ticarcillin

              ticarcillin, probenecid. Either increases levels of the other by decreasing renal clearance. Avoid or Use Alternate Drug.

            • tucatinib

              colchicine will increase the level or effect of tucatinib by Other (see comment). Avoid or Use Alternate Drug. Coadministration of tucatinib (a CYP2C8 substrate) with a strong or moderate CYP2C8 inhibitors increases tucatinib plasma concentrations and risk of toxicities.

              tucatinib will increase the level or effect of colchicine 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.

            Monitor Closely (166)

            • abrocitinib

              abrocitinib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor and titrate dose of P-gp substrate appropriately.

            • acalabrutinib

              acalabrutinib, colchicine. Either increases toxicity of the other by pharmacodynamic synergism. Use Caution/Monitor. Coadministration may increase risk of myelosuppressive effects.

            • aceclofenac

              aceclofenac will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • acemetacin

              acemetacin will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • acyclovir

              acyclovir will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • aminohippurate sodium

              aminohippurate sodium will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • amobarbital

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

            • armodafinil

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

            • artemether/lumefantrine

              artemether/lumefantrine will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • aspirin/citric acid/sodium bicarbonate

              aspirin/citric acid/sodium bicarbonate decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • atogepant

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

            • axitinib

              colchicine decreases levels of axitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • balsalazide

              balsalazide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              balsalazide decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • belzutifan

              belzutifan will decrease the level or effect of colchicine 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.

            • bendroflumethiazide

              bendroflumethiazide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • berotralstat

              berotralstat will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Monitor or titrate P-gp substrate dose if coadministered.

            • bosentan

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

            • budesonide

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

            • butabarbital

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

            • butalbital

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

            • cabozantinib

              probenecid will increase the level or effect of cabozantinib by Other (see comment). Use Caution/Monitor. MRP2 inhibitors increase cabozantinib toxicity

            • cefaclor

              cefaclor will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefadroxil

              cefadroxil will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefamandole

              cefamandole will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefazolin

              probenecid increases levels of cefazolin by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefdinir

              probenecid will increase the level or effect of cefdinir by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefditoren

              probenecid will increase the level or effect of cefditoren by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefepime

              probenecid will increase the level or effect of cefepime by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefixime

              probenecid will increase the level or effect of cefixime by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefotaxime

              probenecid will increase the level or effect of cefotaxime by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefotetan

              probenecid will increase the level or effect of cefotetan by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefoxitin

              probenecid will increase the level or effect of cefoxitin by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefpirome

              cefpirome will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefpodoxime

              probenecid will increase the level or effect of cefpodoxime by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefprozil

              probenecid will increase the level or effect of cefprozil by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ceftaroline

              probenecid increases levels of ceftaroline by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ceftazidime

              probenecid will increase the level or effect of ceftazidime by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ceftazidime/avibactam

              probenecid increases levels of ceftazidime/avibactam by decreasing renal clearance. Use Caution/Monitor. Avoid, coadministration not recommended according to the prescribing information. In vitro, probenecid inhibits uptake of avibactam by OATP1 and OATP3 transporters in the kidney by 56-70%. This may result in decreased renal elimination of avibactam.

            • ceftibuten

              ceftibuten will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ceftriaxone

              probenecid will increase the level or effect of ceftriaxone by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cefuroxime

              probenecid will increase the level or effect of cefuroxime by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • celecoxib

              celecoxib will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cenobamate

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

            • cephalexin

              cephalexin will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • chlorothiazide

              chlorothiazide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • chlorpropamide

              chlorpropamide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              probenecid increases levels of chlorpropamide by unspecified interaction mechanism. Use Caution/Monitor. Risk of hypoglycemia.

            • chlorthalidone

              chlorthalidone will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • choline magnesium trisalicylate

              choline magnesium trisalicylate will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              choline magnesium trisalicylate decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • ciprofloxacin

              probenecid will increase the level or effect of ciprofloxacin by Other (see comment). Use Caution/Monitor. Probenecid interferes with renal tubular secretion of ciprofloxacin and produces an increase in the ciprofloxacin levels in the serum

            • cobicistat

              cobicistat will increase the level or effect of colchicine by Other (see comment). Modify Therapy/Monitor Closely. Coadministration with colchicine is contraindicated in patients with renal and/or hepatic impairment due to potential for serious and/or life-threatening reactions. Dosage adjustment of colchicine may be necessary upon coadministration with cobicistat. Refer colchicine prescribing information for dosing instructions.

            • cortisone

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

            • crofelemer

              crofelemer increases levels of colchicine 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

              cyclopenthiazide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • cyclosporine

              colchicine increases effects of cyclosporine by pharmacodynamic synergism. Use Caution/Monitor.

            • dabrafenib

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

            • deferasirox

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

            • deferiprone

              probenecid will increase the level or effect of deferiprone by decreasing metabolism. Use Caution/Monitor. Coadministration with UGT1A6 inhibitors may increase serum concentration of deferiprone.

            • dexamethasone

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

            • diclofenac

              diclofenac will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • dicloxacillin

              probenecid increases levels of dicloxacillin by decreasing renal clearance. Use Caution/Monitor.

            • dienogest/estradiol valerate

              colchicine will decrease the level or effect of dienogest/estradiol valerate by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Advise women to use alternative method of contraception or back-up method when moderate or weak enzyme inducer is used with combination contraceptives. Back-up contraception should be continued for 28 days after discontinuing medication to ensure contraceptive reliability.

            • diflunisal

              diflunisal will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              diflunisal decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • elagolix

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

              elagolix will decrease the level or effect of colchicine 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.

            • elvitegravir/cobicistat/emtricitabine/tenofovir DF

              elvitegravir/cobicistat/emtricitabine/tenofovir DF increases levels of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Do not coadminister if renal or hepatic impairment present; dosage modification of colchicine required when coadministered.

            • encorafenib

              encorafenib, colchicine. 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.

            • eslicarbazepine acetate

              eslicarbazepine acetate will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • ethambutol

              ethambutol decreases effects of probenecid by Other (see comment). Use Caution/Monitor. Comment: Hyperuricemia reported with ethambutol and precipitation of gout reported; uric acid lowering agents may be require dosage adjustment.

            • etodolac

              etodolac will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • etravirine

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

            • famciclovir

              probenecid increases levels of famciclovir by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor. Coadministration of famciclovir with drugs that are significantly eliminated by active renal tubular secretion may increase plasma concentrations of famciclovir's active moiety (ie, penciclovir).

            • fedratinib

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

            • fenoprofen

              fenoprofen will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ferric maltol

              ferric maltol, colchicine. Either increases levels of the other by unspecified interaction mechanism. Modify Therapy/Monitor Closely. Coadministration of ferric maltol with certain oral medications may decrease the bioavailability of either ferric maltol and some oral drugs. For oral drugs where reductions in bioavailability may cause clinically significant effects on its safety or efficacy, separate administration of ferric maltol from these drugs. Duration of separation may depend on the absorption of the medication concomitantly administered (eg, time to peak concentration, whether the drug is an immediate or extended release product).

            • fludrocortisone

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

            • flurbiprofen

              flurbiprofen will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ganciclovir

              ganciclovir will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • glimepiride

              probenecid increases levels of glimepiride by unspecified interaction mechanism. Use Caution/Monitor. Risk of hypoglycemia.

            • glipizide

              probenecid increases levels of glipizide by unspecified interaction mechanism. Use Caution/Monitor. Risk of hypoglycemia.

            • glyburide

              probenecid increases levels of glyburide by unspecified interaction mechanism. Use Caution/Monitor. Risk of hypoglycemia.

            • glycerol phenylbutyrate

              glycerol phenylbutyrate will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Glycerol phenylbutyrate is a weak inducer of CYP3A4. Monitor for decreased efficacy of CYP3A4 substrates that have a narrow therapeutic index.

              probenecid, glycerol phenylbutyrate. decreasing renal clearance. Use Caution/Monitor. Probenecid may inhibit the renal excretion glycerol phenylbutyrate metabolites PAA and PAGN; caution when adjusting doses based on these metabolite levels.

            • griseofulvin

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

            • hydrochlorothiazide

              hydrochlorothiazide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • hydrocortisone

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

            • hydroxyurea

              hydroxyurea increases levels of probenecid by Other (see comment). Use Caution/Monitor. Comment: Dosage adjustment of probenecid may be needed.

            • ibuprofen

              ibuprofen will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ibuprofen IV

              ibuprofen IV will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • iloperidone

              iloperidone increases levels of colchicine 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.

            • indapamide

              indapamide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • indomethacin

              indomethacin will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • isavuconazonium sulfate

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

              isavuconazonium sulfate will increase the level or effect of colchicine by Other (see comment). Use Caution/Monitor. Isavuconazonium sulfate, an inhibitor of P-gp and CYP3A4, may increase the effects or levels of sensitive P-gp or CYP3A4 substrates, which may require dose adjustment.

            • istradefylline

              istradefylline will increase the level or effect of colchicine 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 colchicine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Istradefylline 40 mg/day increased peak levels and AUC of P-gp substrates in clinical trials. Consider dose reduction of sensitive P-gp substrates.

            • ketoprofen

              ketoprofen will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ketorolac

              ketorolac will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • ketorolac intranasal

              ketorolac intranasal will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • letermovir

              letermovir increases levels of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.

            • levoketoconazole

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

            • linagliptin

              colchicine will increase the level or effect of linagliptin by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Use of alternative treatments is strongly recommended when linagliptin is to be administered with a CYP3A4 inducer

            • lonafarnib

              lonafarnib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Lonafarnib is a weak P-gp inhibitor. Monitor for adverse reactions if coadministered with P-gp substrates where minimal concentration changes may lead to serious or life-threatening toxicities. Reduce P-gp substrate dose if needed.

            • lornoxicam

              lornoxicam will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • lumefantrine

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

            • mavacamten

              probenecid will increase the level or effect of mavacamten by affecting hepatic enzyme CYP2C19 metabolism. Modify Therapy/Monitor Closely. Inititiation of weak CYP2C19 inhibitors may require decreased mavacamten dose.

            • meclofenamate

              meclofenamate will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • mefenamic acid

              mefenamic acid will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • meloxicam

              meloxicam will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • meropenem

              probenecid increases levels of meropenem by decreasing elimination. Use Caution/Monitor.

            • mesalamine

              mesalamine will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              mesalamine decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • methotrexate

              probenecid will increase the level or effect of methotrexate by Other (see comment). Use Caution/Monitor. Methotrexate plasma levels, therapeutic effects, and toxicity may be enhanced. Monitor methotrexate concentrations and adjust dose accordingly.

            • methyclothiazide

              methyclothiazide will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • methylprednisolone

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

            • metolazone

              metolazone will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • mitotane

              mitotane decreases levels of colchicine 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.

            • mycophenolate

              probenecid increases levels of mycophenolate by decreasing renal clearance. Use Caution/Monitor. Probenecid may interfere with renal tubular secretion of mycophenolate active metabolites.

            • nabumetone

              nabumetone will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • nafcillin

              probenecid will increase the level or effect of nafcillin by decreasing renal clearance. Use Caution/Monitor.

            • naproxen

              naproxen will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • nevirapine

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

            • oseltamivir

              probenecid increases levels of oseltamivir by Other (see comment). Use Caution/Monitor. Comment: Coadministration of probenecid results in a 2-fold increase in exposure to oseltamivir carboxylate because of a decrease in active anionic tubular secretion in the kidney. No dosage adjustments are required with probenecid coadministration.

            • oxaprozin

              oxaprozin will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • oxcarbazepine

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

            • paclitaxel

              colchicine will increase the level or effect of paclitaxel by Other (see comment). Use Caution/Monitor. Paclitaxel levels/toxicity may increase when coadministered with CYP2C8 inhibitors

            • paclitaxel protein bound

              colchicine will increase the level or effect of paclitaxel protein bound by Other (see comment). Use Caution/Monitor. Paclitaxel levels/toxicity may increase when coadministered with CYP2C8 inhibitors

            • parecoxib

              parecoxib will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • penicillin G aqueous

              probenecid increases levels of penicillin G aqueous by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • pentobarbital

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

            • phenobarbital

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

            • phenytoin

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

            • piperacillin

              probenecid will increase the level or effect of piperacillin by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • piroxicam

              piroxicam will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • pitolisant

              pitolisant will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Pitolisant is a borderline/weak inducer of CYP3A4. Monitor sensitive CYP3A4 substrates for reduced effectiveness if coadministered.

            • pralatrexate

              probenecid increases levels of pralatrexate by decreasing renal clearance. Use Caution/Monitor.

            • prednisone

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

            • primidone

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

            • pyrazinamide

              pyrazinamide decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • rifampin

              probenecid will increase the level or effect of rifampin by unspecified interaction mechanism. Use Caution/Monitor. Concomitant use with probenecid increase concentration of rifampin which may increase risk of toxicity; monitor for adverse reactions during coadministration

            • rifapentine

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

            • rose hips

              rose hips will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • rucaparib

              rucaparib will increase the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Adjust dosage of CYP3A4 substrates, if clinically indicated.

            • rufinamide

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

            • salicylates (non-asa)

              salicylates (non-asa) will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              salicylates (non-asa) decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • salsalate

              salsalate will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              salsalate decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • secobarbital

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

            • selexipag

              colchicine will increase the level or effect of selexipag by decreasing metabolism. Modify Therapy/Monitor Closely. Reduce selexipag dose to once daily if coadministered with moderate CYP2C8 inhibitors.

            • siltuximab

              siltuximab, colchicine. Other (see comment). Use Caution/Monitor. Comment: CYP450 activity in the liver is down regulated by infection and inflammation stimuli including cytokines (eg, IL-6); inhibition of IL-6 by siltuximab may restore CYP450 enzymatic activity; caution if coadministered with CYP substrates that have a narrow therapeutic index.

            • sodium phenylacetate

              probenecid increases levels of sodium phenylacetate by decreasing renal clearance. Use Caution/Monitor.

            • sodium phenylbutyrate

              probenecid increases levels of sodium phenylbutyrate by decreasing renal clearance. Use Caution/Monitor.

            • sofosbuvir/velpatasvir

              sofosbuvir/velpatasvir increases levels of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Velpatasvir inhibits CYP3A4. Caution if coadministered with drugs with narrow therapeutics indexes.

            • sulfasalazine

              sulfasalazine will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              sulfasalazine decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            • sulindac

              sulindac will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • tazemetostat

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

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

            • tecovirimat

              tecovirimat will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. Tecovirimat is a weak CYP3A4 inducer. Monitor sensitive CYP3A4 substrates for effectiveness if coadministered.

            • teduglutide

              teduglutide increases levels of colchicine by Other (see comment). Use Caution/Monitor. Comment: Teduglutide may increase absorption of concomitant PO medications; caution with with drugs requiring titration or those with a narrow therapeutic index; dose adjustment may be necessary.

            • telotristat ethyl

              telotristat ethyl will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Telotristat ethyl induces CYP3A4 and may reduce systemic exposure of sensitive CYP3A4 substrates. Monitor for suboptimal efficacy and consider increasing the dose of the CYP3A4 substrate.

            • tenofovir DF

              probenecid increases levels of tenofovir DF by decreasing renal clearance. Use Caution/Monitor. Potential for increased toxicity. .

            • tinidazole

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

            • tipranavir

              tipranavir increases levels of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Use alternatives if available. Colchicine dose reduction recommended. Contraindicated in patients with renal or hepatic impairment. .

            • tolazamide

              probenecid increases levels of tolazamide by unspecified interaction mechanism. Use Caution/Monitor. Risk of hypoglycemia.

            • tolbutamide

              probenecid increases levels of tolbutamide by unspecified interaction mechanism. Use Caution/Monitor. Risk of hypoglycemia.

            • tolfenamic acid

              tolfenamic acid will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • tolmetin

              tolmetin will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • topiramate

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

            • tucatinib

              tucatinib will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Use Caution/Monitor. Consider reducing the dosage of P-gp substrates, where minimal concentration changes may lead to serious or life-threatening toxicities.

            • ubrogepant

              colchicine will decrease the level or effect of ubrogepant by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Monitor Closely. Dose adjustment is recommended with concomitant use of ubrogepant and moderate and weak CYP3A4 inducers. (see Dosage Modifications)

            • ustekinumab

              ustekinumab, colchicine. Other (see comment). Use Caution/Monitor. Comment: Formation of CYP450 enzymes can be altered by increased levels of certain cytokines during chronic inflammation; thus, normalizing the formation of CYP450 enzymes. Upon initiation or discontinuation of ustekinumab in patients who are receiving concomitant CYP450 substrates, particularly those with a narrow therapeutic index, consider monitoring for therapeutic effect.

            • valganciclovir

              probenecid will increase the level or effect of valganciclovir by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

            • voclosporin

              voclosporin will increase the level or effect of colchicine by P-glycoprotein (MDR1) efflux transporter. Modify Therapy/Monitor Closely. Coadministration of voclosporin (a P-gp inhibitor) increases exposure and risk of adverse reactions of P-gp substrates. For certain P-gp substrates with a narrow therapeutic window, refer to prescribing information of these substrates for dosage modifications, if needed.

            • willow bark

              willow bark will increase the level or effect of probenecid by acidic (anionic) drug competition for renal tubular clearance. Use Caution/Monitor.

              willow bark decreases effects of probenecid by unknown mechanism. Use Caution/Monitor.

            Minor (7)

            • aztreonam

              probenecid increases levels of aztreonam by decreasing elimination. Minor/Significance Unknown.

            • benazepril

              probenecid increases levels of benazepril by Other (see comment). Minor/Significance Unknown. Comment: Probenecid may decrease the renal excretion of benazepril; monitor blood pressure.

            • captopril

              probenecid increases effects of captopril by unspecified interaction mechanism. Minor/Significance Unknown.

            • cyanocobalamin

              colchicine decreases levels of cyanocobalamin by inhibition of GI absorption. Applies only to oral form of both agents. Minor/Significance Unknown.

            • dapsone

              probenecid increases levels of dapsone by decreasing elimination. Minor/Significance Unknown.

            • efavirenz

              efavirenz will decrease the level or effect of colchicine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown.

            • enalapril

              probenecid increases effects of enalapril by unspecified interaction mechanism. Minor/Significance Unknown.

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            Adverse Effects

            Frequency Not Defined

            Probenecid

            • CNS: Headache, dizziness
            • Metabolic: Precipitation of acute gouty arthritis
            • Gastrointestinal: Hepatic necrosis, vomiting, nausea, anorexia, sore gums
            • Genitourinary: Nephrotic syndrome, uric acid stones with or without hematuria, renal colic, costovertebral pain, urinary frequency
            • Hypersensitivity: Anaphylaxis, fever, urticaria, pruritus
            • Hematologic: Aplastic anemia, leukopenia, hemolytic anemia which in some patients could be related to genetic deficiency of glucose-6-phosphate dehydrogenase in red blood cells, anemia
            • Integumentary: Dermatitis, alopecia, flushing

            Colchicine

            • Adverse effects appear to be dose dependent; increased colchicine toxicity may occur with hepatic dysfunction
            • CNS: Peripheral neuritis
            • Musculoskeletal: Muscular weakness
            • Gastrointestinal: Nausea, vomiting, abdominal pain, or diarrhea may be particularly troublesome in the presence of peptic ulcer or spastic colon Hypersensitivity: Urticaria
            • Hematologic: Aplastic anemia, agranulocytosis
            • Integumentary: Dermatitis, purpura, alopecia
            • At toxic doses, may cause severe diarrhea, generalized vascular damage, and renal damage with hematuria and oliguria
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            Warnings

            Contraindications

            Hypersensitivity

            Blood dyscrasias

            Uric acid kidney stones Initiation of therapy during an acute gouty attack

            Cautions

            Exacerbation of gout may occur; in such cases additional colchicine or other appropriate therapy required

            Probenecid increases plasma concentrations of methotrexate; if combination must be used, reduce methotrexate dose and monitor methotrexate serum levels

            Salicylates antagonize probenecid’s uricosuric effect

            Rare occurrence of severe allergic reactions and anaphylaxis reported; most within several hours after readministration following prior usage of the drug; discontinue colchicine/probenecid if this occurs

            Hematuria, renal colic, costovertebral pain, and formation of uric acid stones associated with the use may be prevented by alkalization of the urine and a liberal fluid intake

            History of peptic ulcer

            Increased dosage requirements may be needed with renal impairment

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            Pregnancy & Lactation

            Pregnancy Category: C; While not studied in the treatment of gout, data from a limited number of published studies found no evidence of an increased risk of miscarriage, stillbirth, or teratogenic effects among pregnant women using colchicine to treat familial Mediterranean fever

            Lactation: Colchicine is distributed in breast milk; limited information suggests breastfed infants receive <10% of maternal weight-adjusted dose; caution advised and observe infant for adverse effects if breastfeeding

            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

            Colchicine: Inhibits leukocyte migration, decreased phagocytosis in joint, decreased lactic acid production by neutrophils resulting in reducing uric acid crystal deposition and decreasing inflammation

            Probenecid: Uricosuric and renal tubular blocking agent

            Absorption

            Bioavailability: 25-50% (colchicine); >90% (probenecid)

            Onset initial: 12-24 hr (colchicine);1 hr initial (probenecid)

            Onset maximum: 48-72 hr (colchicine); 3 hr (probenecid)

            Peak Plasma Time: 0.5-2 hr (colchicine); 1-5 hr (probenecid)

            Distribution

            Protein Bound: 10-30% (colchicine); 85-95% to albumin (probenecid)

            Vd: 2 L (colchicine); 11 L (probenecid)

            Metabolism

            Colchicine is metabolized by CYP3A4; partially deacetylated in the liver; undergo enterohepatic circulation

            Probenecid is metabolized in the liver to hydroxylated metabolites, N-despropyl metabolite, probenecid acylglucuronide

            Elimination

            Half-life: 4.4 hr (colchicine); 3-17 hr (probenecid)

            Dialyzable: No (colchicine)

            Renal clearance: 0.7 L/hr/kg (colchicine)

            Excretion: 10-20% feces (colchicine); 75-88% urine (probenecid)

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            Images

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            Patient Handout

            A Patient Handout is not currently available for this monograph.
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            Formulary

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            Tier Description
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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.