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Interações medicamentosas

Amiodarone + Thioridazine

Gravidade: Contraindicada

Amiodarone and Thioridazine: contraindicated 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.

O conteúdo clínico desta página está disponível apenas em inglês.

Resumo

Amiodarone and thioridazine each delay ventricular repolarisation, so using them together adds to the chance of marked QTc lengthening. This can precipitate torsades de pointes, particularly with hypokalaemia, bradycardia or structural heart disease.

O que esta interação significa em palavras simples

Amiodarone and Thioridazine are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.

Amiodarone belongs to Cardiovascular; Thioridazine belongs to Central Nervous System.

Nível de evidência: Moderate

Por que acontece

Additive QTc prolongation through hERG potassium channel blockade

O que fazer

Do not co-prescribe; choose an agent without QT liability. If one must continue, obtain ECG and electrolytes first.

O que perguntar ao farmacêutico

  • Is there an alternative to one of these two medicines for me?
  • If both are essential, who is monitoring me and how often?
  • Which symptoms mean I should stop and seek help straight away?

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Perguntas frequentes

Can I take Amiodarone with Thioridazine?

MediHelp rates the interaction as contraindicated. Amiodarone and Thioridazine are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Amiodarone and thioridazine each delay ventricular repolarisation, so using them together adds to the chance of marked QTc lengthening. This can precipitate torsades de pointes, particularly with hypokalaemia, bradycardia or structural heart disease.

How serious is the interaction between Amiodarone and Thioridazine?

MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not co-prescribe; choose an agent without QT liability. If one must continue, obtain ECG and electrolytes first.

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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