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Interactions médicamenteuses

Crizotinib + Saquinavir

Gravité: Contre-indiquée

Crizotinib and Saquinavir: contraindicated interaction.

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Résumé

Both drugs prolong the QT interval and saquinavir is a strong CYP3A4 inhibitor that can raise crizotinib concentrations. Together they increase the risk of serious ventricular arrhythmias including torsades de pointes.

Ce que signifie cette interaction, en termes simples

Crizotinib and Saquinavir 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: Moderate

Pourquoi elle survient

Additive QT prolongation with CYP3A4 inhibition by saquinavir increasing crizotinib exposure.

Conduite à tenir

Avoid the combination and choose an antiretroviral not affecting QT or CYP3A4. If unavoidable, obtain baseline and serial ECGs and correct electrolytes.

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 Crizotinib with Saquinavir?

MediHelp rates the interaction as contraindicated. Crizotinib and Saquinavir 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. Both drugs prolong the QT interval and saquinavir is a strong CYP3A4 inhibitor that can raise crizotinib concentrations. Together they increase the risk of serious ventricular arrhythmias including torsades de pointes.

How serious is the interaction between Crizotinib and Saquinavir?

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 and choose an antiretroviral not affecting QT or CYP3A4. If unavoidable, obtain baseline and serial ECGs and correct electrolytes.

What other medicines interact with Crizotinib?

MediHelp also lists interactions of Crizotinib with, for example, Flibanserin, Lomitapide, Lonafarnib. The full list is on the Crizotinib 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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