Drug interactions
Memantine-donepezil + Metformin
Severity: Minor
Memantine-donepezil and Metformin: 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
Memantine and metformin are both cationic drugs eliminated by renal tubular secretion, so they may compete and slightly raise each other's levels. A clinically important effect is unlikely in patients with normal renal function.
What this interaction means in plain words
Memantine-donepezil and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Memantine-donepezil belongs to Central Nervous System; Metformin belongs to Endocrine.
Why it happens
Competition for renal tubular cationic transport (OCT2/MATE) may reduce metformin clearance.
What to do
No dose change is needed; monitor renal function and glycemic control, particularly in older patients with reduced eGFR.
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
Other interactions of Metformin
Frequently asked questions
Can I take Memantine-donepezil with Metformin?
MediHelp rates the interaction as minor. Memantine-donepezil and Metformin have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Memantine and metformin are both cationic drugs eliminated by renal tubular secretion, so they may compete and slightly raise each other's levels. A clinically important effect is unlikely in patients with normal renal function.
How serious is the interaction between Memantine-donepezil and Metformin?
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 dose change is needed; monitor renal function and glycemic control, particularly in older patients with reduced eGFR.
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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