Drug interactions
Memantine-donepezil + Sotalol
Severity: Major
Memantine-donepezil and Sotalol: 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
Sotalol is a class III antiarrhythmic with a clear risk of dose-dependent QT prolongation and torsades de pointes, and donepezil can add to this effect and further slow heart rate. The combination can be dangerous, especially with renal impairment or low potassium or magnesium.
What this interaction means in plain words
Memantine-donepezil and Sotalol 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.
Memantine-donepezil belongs to Central Nervous System; Sotalol belongs to Cardiovascular.
Why it happens
Additive QT prolongation and bradycardia (potassium channel blockade plus beta-blockade with vagotonic cholinesterase inhibition).
What to do
Avoid the combination if an alternative is available. If both are needed, monitor the ECG, heart rate and electrolytes closely, particularly after dose changes.
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 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 Sotalol
- Arsenic trioxide + Sotalol Contraindicated
- Artemether / lumefantrine + Sotalol Contraindicated
- Disopyramide + Sotalol Contraindicated
- Dofetilide + Sotalol Contraindicated
- Dronedarone + Sotalol Contraindicated
- Droperidol + Sotalol Contraindicated
Frequently asked questions
Can I take Memantine-donepezil with Sotalol?
MediHelp rates the interaction as major. Memantine-donepezil and Sotalol 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. Sotalol is a class III antiarrhythmic with a clear risk of dose-dependent QT prolongation and torsades de pointes, and donepezil can add to this effect and further slow heart rate. The combination can be dangerous, especially with renal impairment or low potassium or magnesium.
How serious is the interaction between Memantine-donepezil and Sotalol?
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 if an alternative is available. If both are needed, monitor the ECG, heart rate and electrolytes closely, particularly after dose changes.
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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