Drug interactions
Donepezil + Quetiapine
Severity: Moderate
Donepezil and Quetiapine: 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
Both agents have been linked to QT prolongation, and donepezil can also cause bradycardia, which promotes torsades de pointes. Combined use may raise the risk of serious arrhythmia in susceptible patients.
What this interaction means in plain words
Donepezil and Quetiapine 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; Quetiapine belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with donepezil-related vagotonic bradycardia as a contributing factor.
What to do
Obtain a baseline ECG and monitor heart rate and QTc, particularly in older patients or those with cardiac disease. Correct electrolyte abnormalities and avoid adding other QT-prolonging drugs.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Donepezil and Quetiapine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine 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 Quetiapine?
MediHelp rates the interaction as moderate. Donepezil and Quetiapine 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. Both agents have been linked to QT prolongation, and donepezil can also cause bradycardia, which promotes torsades de pointes. Combined use may raise the risk of serious arrhythmia in susceptible patients.
How serious is the interaction between Donepezil and Quetiapine?
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 a baseline ECG and monitor heart rate and QTc, particularly in older patients or those with cardiac disease. Correct electrolyte abnormalities and avoid adding other QT-prolonging drugs.
What other medicines interact with Quetiapine?
MediHelp also lists interactions of Quetiapine with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Quetiapine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
