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Interações medicamentosas

Dacomitinib + Flecainide

Gravidade: Grave

Dacomitinib and Flecainide: major interaction.

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Resumo

Dacomitinib strongly inhibits CYP2D6, which is a main route of flecainide metabolism. Flecainide levels may therefore rise, increasing the risk of conduction abnormalities and proarrhythmia because it has a narrow therapeutic index.

O que esta interação significa em palavras simples

Dacomitinib and Flecainide 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.

Dacomitinib belongs to Oncology; Flecainide belongs to Cardiovascular.

Nível de evidência: Moderate

Por que acontece

Dacomitinib inhibits CYP2D6, reducing flecainide clearance.

O que fazer

Avoid the combination where possible. If it cannot be avoided, monitor the ECG and flecainide plasma concentrations, and reduce the flecainide dose as needed.

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 Dacomitinib with Flecainide?

MediHelp rates the interaction as major. Dacomitinib and Flecainide 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. Dacomitinib strongly inhibits CYP2D6, which is a main route of flecainide metabolism. Flecainide levels may therefore rise, increasing the risk of conduction abnormalities and proarrhythmia because it has a narrow therapeutic index.

How serious is the interaction between Dacomitinib and Flecainide?

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 where possible. If it cannot be avoided, monitor the ECG and flecainide plasma concentrations, and reduce the flecainide dose as needed.

What other medicines interact with Flecainide?

MediHelp also lists interactions of Flecainide with, for example, Nirmatrelvir, Nirmatrelvir / ritonavir, Pimozide. The full list is on the Flecainide page.

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