Drug interactions
Donepezil + Granisetron
Severity: Moderate
Donepezil and Granisetron: moderate 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
Donepezil has been associated with QT prolongation and torsades de pointes, and granisetron may add to this effect. The risk is highest in patients with bradycardia, electrolyte abnormalities or cardiac disease.
What this interaction means in plain words
Donepezil and Granisetron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Donepezil belongs to Central Nervous System; Granisetron belongs to Gastrointestinal Tract.
Why it happens
Additive effects on cardiac repolarization; donepezil also adds a vagotonic bradycardic effect that favors arrhythmia.
What to do
Obtain an ECG in patients with cardiac risk factors and correct potassium and magnesium. Monitor for bradycardia, syncope or palpitations and use a different antiemetic if the QTc lengthens substantially.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Granisetron
- Apomorphine + Granisetron Contraindicated
- Amiodarone + Granisetron Major
- Amisulpride + Granisetron Major
- Arsenic trioxide + Granisetron Major
- Artemether / lumefantrine + Granisetron Major
- Artemether + Granisetron Major
Other interactions of Donepezil
- Donepezil + Dronedarone Contraindicated
- Donepezil + Pimozide Contraindicated
- Donepezil + Thioridazine Contraindicated
- Donepezil + Vandetanib Contraindicated
- Amiodarone + Donepezil Major
- Amisulpride + Donepezil Major
Frequently asked questions
Can I take Donepezil with Granisetron?
MediHelp rates the interaction as moderate. Donepezil and Granisetron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Donepezil has been associated with QT prolongation and torsades de pointes, and granisetron may add to this effect. The risk is highest in patients with bradycardia, electrolyte abnormalities or cardiac disease.
How serious is the interaction between Donepezil and Granisetron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain an ECG in patients with cardiac risk factors and correct potassium and magnesium. Monitor for bradycardia, syncope or palpitations and use a different antiemetic if the QTc lengthens substantially.
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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