Drug interactions
Memantine-donepezil + Neostigmine
Severity: Moderate
Memantine-donepezil and Neostigmine: 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 neostigmine are both cholinesterase inhibitors, so combining them produces additive cholinergic stimulation. This can cause bradycardia, excessive secretions, bronchospasm, nausea, vomiting, diarrhea and muscle weakness.
What this interaction means in plain words
Memantine-donepezil and Neostigmine 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; Neostigmine belongs to Central Nervous System.
Why it happens
Additive acetylcholinesterase inhibition leading to excess cholinergic stimulation.
What to do
Avoid routine concurrent use unless clearly needed. If both are given, monitor heart rate, GI and respiratory symptoms and muscle strength, and reduce the dose if cholinergic toxicity appears.
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 Neostigmine
Frequently asked questions
Can I take Memantine-donepezil with Neostigmine?
MediHelp rates the interaction as moderate. Memantine-donepezil and Neostigmine 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 neostigmine are both cholinesterase inhibitors, so combining them produces additive cholinergic stimulation. This can cause bradycardia, excessive secretions, bronchospasm, nausea, vomiting, diarrhea and muscle weakness.
How serious is the interaction between Memantine-donepezil and Neostigmine?
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 routine concurrent use unless clearly needed. If both are given, monitor heart rate, GI and respiratory symptoms and muscle strength, and reduce the dose if cholinergic toxicity appears.
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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