Drug interactions
Donepezil + Ipratropium
Severity: Moderate
Donepezil and Ipratropium: 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 increases acetylcholine by inhibiting cholinesterase, whereas ipratropium blocks muscarinic receptors, so each may reduce the effect of the other. Because ipratropium is poorly absorbed systemically, the practical impact is usually small, but cholinergic effects on the airways may matter in some patients.
What this interaction means in plain words
Donepezil and Ipratropium 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 belongs to Central Nervous System; Ipratropium belongs to Respiratory.
Why it happens
Pharmacodynamic opposition between cholinesterase inhibition and muscarinic receptor antagonism.
What to do
Monitor for reduced cognitive benefit from donepezil and for changes in respiratory symptoms. Reassess therapy if either drug appears less effective.
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 Ipratropium
- Aclidinium + Ipratropium Moderate
- Benztropine + Ipratropium Moderate
- Bethanechol + Ipratropium Moderate
- Cevimeline + Ipratropium Moderate
- Chlorpromazine + Ipratropium Moderate
- Clomipramine + Ipratropium Moderate
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 Ipratropium?
MediHelp rates the interaction as moderate. Donepezil and Ipratropium 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 increases acetylcholine by inhibiting cholinesterase, whereas ipratropium blocks muscarinic receptors, so each may reduce the effect of the other. Because ipratropium is poorly absorbed systemically, the practical impact is usually small, but cholinergic effects on the airways may matter in some patients.
How serious is the interaction between Donepezil and Ipratropium?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for reduced cognitive benefit from donepezil and for changes in respiratory symptoms. Reassess therapy if either drug appears less effective.
What other medicines interact with Ipratropium?
MediHelp also lists interactions of Ipratropium with, for example, Aclidinium, Benztropine, Bethanechol. The full list is on the Ipratropium page.
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