Drug interactions
Amiodarone + Granisetron
Severity: Major
Amiodarone and Granisetron: major interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Amiodarone markedly prolongs the QT interval and granisetron has a smaller QT effect. Together they can add to the risk of torsades de pointes.
What this interaction means in plain words
Amiodarone and Granisetron 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; Granisetron belongs to Gastrointestinal Tract.
Why it happens
Additive QT prolongation through blockade of cardiac repolarizing currents.
What to do
Use a non-QT-prolonging antiemetic if possible. If used together, correct potassium and magnesium and monitor the ECG.
What to ask your pharmacist
- 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?
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Other interactions of Granisetron
- Apomorphine + Granisetron Contraindicated
- Amisulpride + Granisetron Major
- Arsenic trioxide + Granisetron Major
- Artemether / lumefantrine + Granisetron Major
- Artemether + Granisetron Major
- Asenapine transdermal + Granisetron Major
Other interactions of Amiodarone
- Amiodarone + Amisulpride Contraindicated
- Amiodarone + Arsenic trioxide Contraindicated
- Amiodarone + Dofetilide Contraindicated
- Amiodarone + Dronedarone Contraindicated
- Amiodarone + Droperidol Contraindicated
- Amiodarone + Eliglustat Contraindicated
Frequently asked questions
Can I take Amiodarone with Granisetron?
MediHelp rates the interaction as major. Amiodarone and Granisetron 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 markedly prolongs the QT interval and granisetron has a smaller QT effect. Together they can add to the risk of torsades de pointes.
How serious is the interaction between Amiodarone and Granisetron?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use a non-QT-prolonging antiemetic if possible. If used together, correct potassium and magnesium and monitor the ECG.
What other medicines interact with Granisetron?
MediHelp also lists interactions of Granisetron with, for example, Apomorphine, Amisulpride, Arsenic trioxide. The full list is on the Granisetron page.
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