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Interações medicamentosas

Dronedarone + Tolterodine

Gravidade: Grave

Dronedarone 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

Dronedarone is a moderate CYP3A4 inhibitor and a CYP2D6 inhibitor, so it can raise tolterodine exposure. Tolterodine and dronedarone can each prolong the QT interval, so higher tolterodine levels may increase arrhythmia risk. Anticholinergic adverse effects are also more likely.

O que esta interação significa em palavras simples

Dronedarone 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.

Dronedarone belongs to Cardiovascular; Tolterodine belongs to Genitourinary.

Nível de evidência: Moderate

Por que acontece

Dronedarone inhibits CYP3A4 and CYP2D6 metabolism of tolterodine, with additive QT effects.

O que fazer

Avoid the combination if possible, or use the lowest tolterodine dose and obtain an ECG. Correct potassium and magnesium and watch for palpitations or syncope.

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 Dronedarone with Tolterodine?

MediHelp rates the interaction as major. Dronedarone 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. Dronedarone is a moderate CYP3A4 inhibitor and a CYP2D6 inhibitor, so it can raise tolterodine exposure. Tolterodine and dronedarone can each prolong the QT interval, so higher tolterodine levels may increase arrhythmia risk. Anticholinergic adverse effects are also more likely.

How serious is the interaction between Dronedarone 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: Avoid the combination if possible, or use the lowest tolterodine dose and obtain an ECG. Correct potassium and magnesium and watch for palpitations or syncope.

What other medicines interact with Tolterodine?

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

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