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Interactions médicamenteuses

Efavirenz + Mavacamten

Gravité: Contre-indiquée

Efavirenz and Mavacamten: contraindicated interaction.

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Résumé

Efavirenz affects CYP2C19 and CYP3A4, both of which metabolise mavacamten, so exposure may become unpredictable. Increased exposure can cause systolic dysfunction and heart failure, while reduced exposure impairs efficacy.

Ce que signifie cette interaction, en termes simples

Efavirenz and Mavacamten 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.

Efavirenz belongs to Anti Virals; Mavacamten belongs to Cardiovascular.

Niveau de preuve: Moderate

Pourquoi elle survient

Efavirenz modulation of CYP3A4 and CYP2C19 metabolism of mavacamten.

Conduite à tenir

Avoid the combination and use an alternative antiretroviral. If an interacting drug is started or stopped, monitor LVEF closely.

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 Efavirenz with Mavacamten?

MediHelp rates the interaction as contraindicated. Efavirenz and Mavacamten 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. Efavirenz affects CYP2C19 and CYP3A4, both of which metabolise mavacamten, so exposure may become unpredictable. Increased exposure can cause systolic dysfunction and heart failure, while reduced exposure impairs efficacy.

How serious is the interaction between Efavirenz and Mavacamten?

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 use an alternative antiretroviral. If an interacting drug is started or stopped, monitor LVEF closely.

What other medicines interact with Efavirenz?

MediHelp also lists interactions of Efavirenz with, for example, Cobimetinib, Dienogest / estradiol valerate, Dihydroergotamine intranasal. The full list is on the Efavirenz 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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