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Interazioni tra farmaci

Amiodarone + Ondansetron

Gravità: Maggiore

Amiodarone and Ondansetron: major interaction.

Ultimo aggiornamento Fonti: US FDA label

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Sintesi

Both drugs prolong the QT interval and the combination increases the risk of torsades de pointes. Risk is greatest with intravenous ondansetron at higher doses and in patients with electrolyte disturbance, bradycardia, heart disease or female sex. Amiodarone's long half-life means the risk persists after discontinuation.

Cosa significa questa interazione in parole semplici

Amiodarone and Ondansetron 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; Ondansetron belongs to Gastrointestinal Tract.

Livello di evidenza: Moderate

Perché avviene

Additive blockade of the hERG potassium channel (IKr) causing delayed ventricular repolarisation.

Cosa fare

Prefer a non-QT-prolonging antiemetic where possible. If ondansetron is needed, use the lowest dose, obtain a baseline ECG and correct potassium and magnesium.

Cosa chiedere al farmacista

  • 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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Riferimenti

Domande frequenti

Can I take Amiodarone with Ondansetron?

MediHelp rates the interaction as major. Amiodarone and Ondansetron 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. Both drugs prolong the QT interval and the combination increases the risk of torsades de pointes. Risk is greatest with intravenous ondansetron at higher doses and in patients with electrolyte disturbance, bradycardia, heart disease or female sex. Amiodarone's long half-life means the risk persists after discontinuation.

How serious is the interaction between Amiodarone and Ondansetron?

MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a non-QT-prolonging antiemetic where possible. If ondansetron is needed, use the lowest dose, obtain a baseline ECG and correct potassium and magnesium.

What other medicines interact with Ondansetron?

MediHelp also lists interactions of Ondansetron with, for example, Apomorphine, Thioridazine, Vandetanib. The full list is on the Ondansetron page.

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