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Interações medicamentosas

Cobicistat + Tolterodine

Gravidade: Grave

Cobicistat and Tolterodine: 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 is a strong CYP3A inhibitor and raises tolterodine concentrations, especially in CYP2D6 poor metabolizers. This increases anticholinergic adverse effects and QT risk.

O que esta interação significa em palavras simples

Cobicistat and Tolterodine 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; Tolterodine belongs to Genitourinary.

Nível de evidência: Moderate

Por que acontece

Strong CYP3A4 inhibition by cobicistat (plus some CYP2D6 inhibition) reduces tolterodine metabolism.

O que fazer

Reduce the tolterodine dose to a maximum of 2 mg daily (1 mg twice daily for immediate-release) and monitor for anticholinergic effects and QT prolongation.

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 Tolterodine?

MediHelp rates the interaction as major. Cobicistat and Tolterodine 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 is a strong CYP3A inhibitor and raises tolterodine concentrations, especially in CYP2D6 poor metabolizers. This increases anticholinergic adverse effects and QT risk.

How serious is the interaction between Cobicistat and Tolterodine?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Reduce the tolterodine dose to a maximum of 2 mg daily (1 mg twice daily for immediate-release) and monitor for anticholinergic effects and QT prolongation.

What other medicines interact with Tolterodine?

MediHelp also lists interactions of Tolterodine with, for example, Clarithromycin, Clozapine, Dronedarone. The full list is on the Tolterodine page.

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