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Interactions médicamenteuses

Methotrexate + Probenecid

Gravité: Majeure

Methotrexate and Probenecid: major interaction.

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Résumé

Probenecid reduces the renal elimination of methotrexate, leading to higher and more prolonged methotrexate concentrations. This can cause severe myelosuppression, mucositis and renal or hepatic toxicity, particularly at higher methotrexate doses.

Ce que signifie cette interaction, en termes simples

Methotrexate and Probenecid can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.

Methotrexate belongs to Oncology; Probenecid belongs to Genitourinary.

Niveau de preuve: High

Pourquoi elle survient

Probenecid inhibits organic anion transporters (OAT1/OAT3) in the renal tubule, blocking tubular secretion of methotrexate and its metabolites.

Conduite à tenir

Avoid the combination where possible; if it is unavoidable, reduce the methotrexate dose and monitor blood counts, renal function and methotrexate levels closely.

Questions à poser à votre pharmacien

  • Does the benefit of taking both outweigh the risk in my case?
  • Do I need any blood test, ECG or other check while on both?
  • What early warning signs should I watch for, and what should I do if they appear?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Questions fréquentes

Can I take Methotrexate with Probenecid?

MediHelp rates the interaction as major. Methotrexate and Probenecid can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Probenecid reduces the renal elimination of methotrexate, leading to higher and more prolonged methotrexate concentrations. This can cause severe myelosuppression, mucositis and renal or hepatic toxicity, particularly at higher methotrexate doses.

How serious is the interaction between Methotrexate and Probenecid?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination where possible; if it is unavoidable, reduce the methotrexate dose and monitor blood counts, renal function and methotrexate levels closely.

What other medicines interact with Methotrexate?

MediHelp also lists interactions of Methotrexate with, for example, Acitretin, Adenovirus types 4 and 7 live, Influenza virus vaccine quadrivalent intranasal. The full list is on the Methotrexate page.

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