Drug interactions
Asenapine + Memantine-donepezil
Severity: Moderate
Asenapine and Memantine-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
Donepezil and asenapine can each prolong the QT interval, so combined use may raise the risk of torsades de pointes. The risk is higher in patients with cardiac disease or electrolyte abnormalities.
What this interaction means in plain words
Asenapine and Memantine-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 belongs to Central Nervous System; Memantine-donepezil belongs to Central Nervous System.
Why it happens
Additive QT prolongation.
What to do
Obtain a baseline ECG and monitor it during therapy. Correct hypokalemia and hypomagnesemia, and avoid in patients with congenital long QT.
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 Memantine-donepezil
- Dronedarone + Memantine-donepezil Contraindicated
- Memantine-donepezil + Thioridazine Contraindicated
- Amantadine + Memantine-donepezil Major
- Amiodarone + Memantine-donepezil Major
- Amisulpride + Memantine-donepezil Major
- Amitriptyline + Memantine-donepezil Major
Other interactions of Asenapine
- Asenapine + Pimozide Contraindicated
- Asenapine + Thioridazine Contraindicated
- Asenapine + Vandetanib Contraindicated
- Adagrasib + Asenapine Major
- Alfentanil + Asenapine Major
- Alfuzosin + Asenapine Major
Frequently asked questions
Can I take Asenapine with Memantine-donepezil?
MediHelp rates the interaction as moderate. Asenapine and Memantine-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. Donepezil and asenapine can each prolong the QT interval, so combined use may raise the risk of torsades de pointes. The risk is higher in patients with cardiac disease or electrolyte abnormalities.
How serious is the interaction between Asenapine and Memantine-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 monitor it during therapy. Correct hypokalemia and hypomagnesemia, and avoid in patients with congenital long QT.
What other medicines interact with Memantine-donepezil?
MediHelp also lists interactions of Memantine-donepezil with, for example, Dronedarone, Thioridazine, Amantadine. The full list is on the Memantine-donepezil page.
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