Drug interactions
Asenapine transdermal + Donepezil
Severity: Moderate
Asenapine transdermal and Donepezil: 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
Asenapine can prolong the QT interval, and donepezil is associated with QT prolongation and torsades de pointes. Concurrent use adds to arrhythmia risk, mainly in patients with cardiac disease, bradycardia or electrolyte abnormalities.
What this interaction means in plain words
Asenapine transdermal and Donepezil 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.
Why it happens
Additive delay of cardiac repolarization.
What to do
Obtain a baseline ECG and correct potassium and magnesium before starting. Monitor QTc and reassess the need for both agents if 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 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 Asenapine transdermal with Donepezil?
MediHelp rates the interaction as moderate. Asenapine transdermal and Donepezil 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. Asenapine can prolong the QT interval, and donepezil is associated with QT prolongation and torsades de pointes. Concurrent use adds to arrhythmia risk, mainly in patients with cardiac disease, bradycardia or electrolyte abnormalities.
How serious is the interaction between Asenapine transdermal and Donepezil?
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 correct potassium and magnesium before starting. Monitor QTc and reassess the need for both agents if QTc lengthens substantially.
What other medicines interact with Donepezil?
MediHelp also lists interactions of Donepezil with, for example, Dronedarone, Pimozide, Thioridazine. The full list is on the Donepezil page.
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