Drug interactions
Dicyclomine + Donepezil
Severity: Moderate
Dicyclomine and Donepezil: 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 cholinergic activity while dicyclomine blocks muscarinic receptors, so the two have opposing effects. Dicyclomine may reduce the cognitive benefit of donepezil in dementia.
What this interaction means in plain words
Dicyclomine and Donepezil 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.
Dicyclomine belongs to Respiratory; Donepezil belongs to Central Nervous System.
Why it happens
Pharmacodynamic antagonism between a cholinesterase inhibitor and a muscarinic antagonist.
What to do
Avoid anticholinergics such as dicyclomine in patients taking donepezil when possible; if needed, monitor cognition and function and consider a non-anticholinergic alternative.
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 Dicyclomine
- Clozapine + Dicyclomine Major
- Dicyclomine + Henbane Major
- Dicyclomine + Imipramine Major
- Dicyclomine + Pramlintide Major
- Abobotulinumtoxina + Dicyclomine Moderate
- Aclidinium + Dicyclomine 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 Dicyclomine with Donepezil?
MediHelp rates the interaction as moderate. Dicyclomine and Donepezil 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 cholinergic activity while dicyclomine blocks muscarinic receptors, so the two have opposing effects. Dicyclomine may reduce the cognitive benefit of donepezil in dementia.
How serious is the interaction between Dicyclomine and Donepezil?
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 anticholinergics such as dicyclomine in patients taking donepezil when possible; if needed, monitor cognition and function and consider a non-anticholinergic alternative.
What other medicines interact with Dicyclomine?
MediHelp also lists interactions of Dicyclomine with, for example, Clozapine, Henbane, Imipramine. The full list is on the Dicyclomine page.
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