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Interactions médicamenteuses

Ampicillin-sulbactam + Methotrexate

Gravité: Majeure

Ampicillin-sulbactam and Methotrexate: major interaction.

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Résumé

Penicillins can raise methotrexate concentrations and prolong exposure, leading to increased myelosuppression, mucositis and other toxicity. The effect is most concerning with high-dose methotrexate or impaired renal function.

Ce que signifie cette interaction, en termes simples

Ampicillin-sulbactam and Methotrexate 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.

Ampicillin-sulbactam belongs to Anti Bacterial; Methotrexate belongs to Oncology.

Niveau de preuve: Moderate

Pourquoi elle survient

Competition for renal tubular secretion reduces methotrexate renal clearance.

Conduite à tenir

Monitor methotrexate levels, renal function and blood counts when co-administered, and consider an alternative antibiotic during high-dose methotrexate.

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 Ampicillin-sulbactam with Methotrexate?

MediHelp rates the interaction as major. Ampicillin-sulbactam and Methotrexate 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. Penicillins can raise methotrexate concentrations and prolong exposure, leading to increased myelosuppression, mucositis and other toxicity. The effect is most concerning with high-dose methotrexate or impaired renal function.

How serious is the interaction between Ampicillin-sulbactam and Methotrexate?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor methotrexate levels, renal function and blood counts when co-administered, and consider an alternative antibiotic during high-dose methotrexate.

What other medicines interact with Ampicillin-sulbactam?

MediHelp also lists interactions of Ampicillin-sulbactam with, for example, Allopurinol, Bcg vaccine live, Chloramphenicol. The full list is on the Ampicillin-sulbactam page.

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Ouvrez le référentiel complet, vérifiez les interactions entre plusieurs médicaments et utilisez les outils de posologie dans l'application MediHelp.

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