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Interactions médicamenteuses

Colchicine + Nirmatrelvir / ritonavir

Gravité: Contre-indiquée

Colchicine and Nirmatrelvir / ritonavir: contraindicated interaction.

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Résumé

Ritonavir strongly inhibits CYP3A4 and P-glycoprotein and can greatly raise colchicine levels. This may cause fatal colchicine toxicity including bone marrow suppression, multiorgan failure and neuromuscular toxicity, especially in renal or hepatic impairment.

Ce que signifie cette interaction, en termes simples

Colchicine and Nirmatrelvir / ritonavir are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.

Niveau de preuve: High

Pourquoi elle survient

Inhibition of CYP3A4 and P-glycoprotein by ritonavir reduces colchicine clearance.

Conduite à tenir

Avoid the combination; hold colchicine during the antiviral course or choose an alternative. Do not combine in patients with renal or hepatic impairment.

Questions à poser à votre pharmacien

  • Is there an alternative to one of these two medicines for me?
  • If both are essential, who is monitoring me and how often?
  • Which symptoms mean I should stop and seek help straight away?

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 Colchicine with Nirmatrelvir / ritonavir?

MediHelp rates the interaction as contraindicated. Colchicine and Nirmatrelvir / ritonavir are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Ritonavir strongly inhibits CYP3A4 and P-glycoprotein and can greatly raise colchicine levels. This may cause fatal colchicine toxicity including bone marrow suppression, multiorgan failure and neuromuscular toxicity, especially in renal or hepatic impairment.

How serious is the interaction between Colchicine and Nirmatrelvir / ritonavir?

MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination; hold colchicine during the antiviral course or choose an alternative. Do not combine in patients with renal or hepatic impairment.

What other medicines interact with Colchicine?

MediHelp also lists interactions of Colchicine with, for example, Clarithromycin, Cobicistat, Cyclosporine. The full list is on the Colchicine 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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