Drug interactions
Donepezil + Tiotropium
Severity: Minor
Donepezil and Tiotropium: 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
Donepezil increases acetylcholine by inhibiting cholinesterase, whereas tiotropium blocks muscarinic receptors, so they may oppose one another. Efficacy of donepezil may be slightly reduced, though systemic tiotropium exposure is low.
What this interaction means in plain words
Donepezil and Tiotropium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Donepezil belongs to Central Nervous System; Tiotropium belongs to Respiratory.
Why it happens
Pharmacodynamic antagonism between a cholinesterase inhibitor and a muscarinic antagonist.
What to do
Monitor cognitive response to donepezil. Monitor heart rate and respiratory symptoms, as cholinergic effects may affect bronchial tone.
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 Tiotropium
Other interactions of Donepezil
- Donepezil + Dronedarone Contraindicated
- Donepezil + Pimozide Contraindicated
- Donepezil + Thioridazine Contraindicated
- Donepezil + Vandetanib Contraindicated
- Amiodarone + Donepezil Major
- Amisulpride + Donepezil Major
Frequently asked questions
Can I take Donepezil with Tiotropium?
MediHelp rates the interaction as minor. Donepezil and Tiotropium have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Donepezil increases acetylcholine by inhibiting cholinesterase, whereas tiotropium blocks muscarinic receptors, so they may oppose one another. Efficacy of donepezil may be slightly reduced, though systemic tiotropium exposure is low.
How serious is the interaction between Donepezil and Tiotropium?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor cognitive response to donepezil. Monitor heart rate and respiratory symptoms, as cholinergic effects may affect bronchial tone.
What other medicines interact with Tiotropium?
MediHelp also lists interactions of Tiotropium with, for example, Glycopyrrolate inhaled, Indacaterol-glycopyrronium, Revefenacin. The full list is on the Tiotropium page.
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