Drug interactions
Memantine-donepezil + Pralidoxime
Severity: Minor
Memantine-donepezil and Pralidoxime: minor 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
Pralidoxime reactivates acetylcholinesterase inhibited by organophosphates, which in principle could reduce the effect of donepezil. In practice the interaction is poorly characterized and its significance is unclear.
What this interaction means in plain words
Memantine-donepezil and Pralidoxime have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Pralidoxime may reactivate cholinesterase and theoretically oppose donepezil's enzyme inhibition, but this is not well established.
What to do
No routine change is needed; in organophosphate poisoning treat according to the toxicological emergency and reassess donepezil need afterward.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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
Frequently asked questions
Can I take Memantine-donepezil with Pralidoxime?
MediHelp rates the interaction as minor. Memantine-donepezil and Pralidoxime have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Pralidoxime reactivates acetylcholinesterase inhibited by organophosphates, which in principle could reduce the effect of donepezil. In practice the interaction is poorly characterized and its significance is unclear.
How serious is the interaction between Memantine-donepezil and Pralidoxime?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed; in organophosphate poisoning treat according to the toxicological emergency and reassess donepezil need afterward.
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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