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Interações medicamentosas

Amiodarone + Lapatinib

Gravidade: Grave

Amiodarone and Lapatinib: major interaction.

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Resumo

Lapatinib can prolong the QT interval and amiodarone strongly does so as well, increasing the risk of torsades de pointes. Amiodarone may also modestly raise lapatinib exposure through CYP3A4 and P-glycoprotein effects.

O que esta interação significa em palavras simples

Amiodarone and Lapatinib 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.

Amiodarone belongs to Cardiovascular; Lapatinib belongs to Oncology.

Nível de evidência: Moderate

Por que acontece

Additive QT prolongation, plus possible inhibition of lapatinib metabolism and efflux by amiodarone.

O que fazer

Avoid combining where possible. If necessary, monitor ECG and electrolytes and watch for lapatinib toxicity such as diarrhea or hepatotoxicity.

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 Amiodarone with Lapatinib?

MediHelp rates the interaction as major. Amiodarone and Lapatinib 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. Lapatinib can prolong the QT interval and amiodarone strongly does so as well, increasing the risk of torsades de pointes. Amiodarone may also modestly raise lapatinib exposure through CYP3A4 and P-glycoprotein effects.

How serious is the interaction between Amiodarone and Lapatinib?

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 combining where possible. If necessary, monitor ECG and electrolytes and watch for lapatinib toxicity such as diarrhea or hepatotoxicity.

What other medicines interact with Amiodarone?

MediHelp also lists interactions of Amiodarone with, for example, Amisulpride, Arsenic trioxide, Dofetilide. The full list is on the Amiodarone page.

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