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Interactions médicamenteuses

Drospirenone + Fosamprenavir

Gravité: Majeure

Drospirenone and Fosamprenavir: major interaction.

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Résumé

Fosamprenavir (as amprenavir) alters hormonal contraceptive exposure and can reduce amprenavir levels; combining may compromise contraceptive efficacy and antiretroviral exposure. Hormonal contraceptive concentrations are changed unpredictably, and drospirenone may raise potassium.

Ce que signifie cette interaction, en termes simples

Drospirenone and Fosamprenavir 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.

Niveau de preuve: Moderate

Pourquoi elle survient

Fosamprenavir/ritonavir modulates CYP3A4 and other enzymes, altering metabolism of the contraceptive hormones.

Conduite à tenir

Avoid hormonal contraceptives with fosamprenavir where possible and use non-hormonal or alternative methods. If used, monitor potassium and contraceptive efficacy.

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 Drospirenone with Fosamprenavir?

MediHelp rates the interaction as major. Drospirenone and Fosamprenavir 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. Fosamprenavir (as amprenavir) alters hormonal contraceptive exposure and can reduce amprenavir levels; combining may compromise contraceptive efficacy and antiretroviral exposure. Hormonal contraceptive concentrations are changed unpredictably, and drospirenone may raise potassium.

How serious is the interaction between Drospirenone and Fosamprenavir?

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 hormonal contraceptives with fosamprenavir where possible and use non-hormonal or alternative methods. If used, monitor potassium and contraceptive efficacy.

What other medicines interact with Drospirenone?

MediHelp also lists interactions of Drospirenone with, for example, Belzutifan, Bosentan, Carbamazepine. The full list is on the Drospirenone 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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