藥物交互作用
Amiodarone + Ondansetron
嚴重程度: 嚴重
Amiodarone and Ondansetron: major interaction.
最後更新 來源: US FDA label
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摘要
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.
用白話說明這項交互作用的意義
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.
為什麼會發生
Additive blockade of the hERG potassium channel (IKr) causing delayed ventricular repolarisation.
處置方式
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.
可向藥師詢問的問題
- 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?
參考資料
Ondansetron 的其他交互作用
Amiodarone 的其他交互作用
常見問題
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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