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Interactions médicamenteuses

Dofetilide + Dolasetron

Gravité: Contre-indiquée

Dofetilide and Dolasetron: contraindicated interaction.

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Résumé

Dofetilide has a narrow therapeutic window with a dose-related risk of torsades de pointes, and dolasetron adds further QT, QRS and PR prolongation. The combination may precipitate life-threatening ventricular arrhythmia.

Ce que signifie cette interaction, en termes simples

Dofetilide and Dolasetron 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.

Dofetilide belongs to Cardiovascular; Dolasetron belongs to Gastrointestinal Tract.

Niveau de preuve: Moderate

Pourquoi elle survient

Additive prolongation of cardiac repolarization through potassium channel blockade, on top of dofetilide's potent IKr inhibition.

Conduite à tenir

Avoid the combination and use an antiemetic without QT effects, such as a non-serotonergic agent, in patients receiving dofetilide.

Questions à poser à votre pharmacien

  • 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?

Bring a full list of your medicines, including over-the-counter products, supplements and herbal remedies, to every pharmacy visit.

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Questions fréquentes

Can I take Dofetilide with Dolasetron?

MediHelp rates the interaction as contraindicated. Dofetilide and Dolasetron 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. Dofetilide has a narrow therapeutic window with a dose-related risk of torsades de pointes, and dolasetron adds further QT, QRS and PR prolongation. The combination may precipitate life-threatening ventricular arrhythmia.

How serious is the interaction between Dofetilide and Dolasetron?

MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and use an antiemetic without QT effects, such as a non-serotonergic agent, in patients receiving dofetilide.

What other medicines interact with Dolasetron?

MediHelp also lists interactions of Dolasetron with, for example, Apomorphine, Ibutilide, Pimozide. The full list is on the Dolasetron page.

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Ouvrez le référentiel complet, vérifiez les interactions entre plusieurs médicaments et utilisez les outils de posologie dans l'application MediHelp.

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