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Interações medicamentosas

Cobicistat + Darifenacin

Gravidade: Grave

Cobicistat and Darifenacin: major interaction.

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Para profissionais de saúde — apenas referência. Esta página é um resumo breve, não é aconselhamento médico nem substitui a bula oficial ou o julgamento clínico. Verifique sempre antes de prescrever ou dispensar.

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Resumo

Cobicistat strongly inhibits CYP3A4 and can substantially raise darifenacin levels, increasing anticholinergic adverse effects. Darifenacin labeling limits its dose with strong CYP3A4 inhibitors.

O que esta interação significa em palavras simples

Cobicistat and Darifenacin 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.

Cobicistat belongs to Miscellaneous; Darifenacin belongs to Genitourinary.

Nível de evidência: High

Por que acontece

Strong CYP3A4 inhibition by cobicistat reduces darifenacin metabolism.

O que fazer

Limit darifenacin to 7.5 mg daily and monitor for dry mouth, constipation, urinary retention and cognitive effects. Consider an alternative agent if tolerability is poor.

O que perguntar ao farmacêutico

  • 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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Perguntas frequentes

Can I take Cobicistat with Darifenacin?

MediHelp rates the interaction as major. Cobicistat and Darifenacin 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. Cobicistat strongly inhibits CYP3A4 and can substantially raise darifenacin levels, increasing anticholinergic adverse effects. Darifenacin labeling limits its dose with strong CYP3A4 inhibitors.

How serious is the interaction between Cobicistat and Darifenacin?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit darifenacin to 7.5 mg daily and monitor for dry mouth, constipation, urinary retention and cognitive effects. Consider an alternative agent if tolerability is poor.

What other medicines interact with Darifenacin?

MediHelp also lists interactions of Darifenacin with, for example, Atazanavir, Bethanechol, Clarithromycin. The full list is on the Darifenacin page.

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