Drug interactions
Memantine-donepezil + Pyridostigmine
Severity: Moderate
Memantine-donepezil and Pyridostigmine: 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 donepezil and pyridostigmine inhibit acetylcholinesterase, so cholinergic effects add together. This can cause bradycardia, abdominal cramps, diarrhea, increased secretions and cholinergic weakness.
What this interaction means in plain words
Memantine-donepezil and Pyridostigmine 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.
Memantine-donepezil belongs to Central Nervous System; Pyridostigmine belongs to Central Nervous System.
Why it happens
Additive cholinesterase inhibition.
What to do
Avoid combining unless clearly indicated. If both are needed, monitor heart rate, GI symptoms and muscle strength, and reduce doses if toxicity develops.
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 Pyridostigmine
Frequently asked questions
Can I take Memantine-donepezil with Pyridostigmine?
MediHelp rates the interaction as moderate. Memantine-donepezil and Pyridostigmine 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 donepezil and pyridostigmine inhibit acetylcholinesterase, so cholinergic effects add together. This can cause bradycardia, abdominal cramps, diarrhea, increased secretions and cholinergic weakness.
How serious is the interaction between Memantine-donepezil and Pyridostigmine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining unless clearly indicated. If both are needed, monitor heart rate, GI symptoms and muscle strength, and reduce doses if toxicity develops.
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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