Drug interactions
Artemether / lumefantrine + Granisetron
Severity: Major
Artemether / lumefantrine 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
Artemether/lumefantrine can prolong the QT interval, and granisetron has a similar effect. Combining them may increase the risk of torsades de pointes, and lumefantrine has a long half-life so the risk persists after the course ends.
What this interaction means in plain words
Artemether / lumefantrine 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.
Why it happens
Additive pharmacodynamic QT prolongation via cardiac potassium channel blockade.
What to do
Avoid the combination where possible and choose a non-QT-prolonging antiemetic. If unavoidable, obtain an ECG and correct potassium and magnesium before and during treatment.
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
- Amiodarone + Granisetron Major
- Amisulpride + Granisetron Major
- Arsenic trioxide + Granisetron Major
- Artemether + Granisetron Major
- Asenapine transdermal + Granisetron Major
Frequently asked questions
Can I take Artemether / lumefantrine with Granisetron?
MediHelp rates the interaction as major. Artemether / lumefantrine 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. Artemether/lumefantrine can prolong the QT interval, and granisetron has a similar effect. Combining them may increase the risk of torsades de pointes, and lumefantrine has a long half-life so the risk persists after the course ends.
How serious is the interaction between Artemether / lumefantrine 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: Avoid the combination where possible and choose a non-QT-prolonging antiemetic. If unavoidable, obtain an ECG and correct potassium and magnesium before and during treatment.
What other medicines interact with Granisetron?
MediHelp also lists interactions of Granisetron with, for example, Apomorphine, Amiodarone, Amisulpride. The full list is on the Granisetron page.
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