Drug interactions
Conivaptan + Donepezil
Severity: Minor
Conivaptan and Donepezil: 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
Conivaptan is a strong CYP3A4 inhibitor and may raise donepezil exposure. Because conivaptan is given short-term in hospital, the effect is likely transient but could cause cholinergic effects like bradycardia.
What this interaction means in plain words
Conivaptan and Donepezil 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
Inhibition of CYP3A4-mediated donepezil metabolism.
What to do
Monitor heart rate and gastrointestinal tolerance during conivaptan infusion. Consider holding donepezil temporarily if bradycardia or marked nausea occurs.
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 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 Conivaptan with Donepezil?
MediHelp rates the interaction as minor. Conivaptan and Donepezil have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Conivaptan is a strong CYP3A4 inhibitor and may raise donepezil exposure. Because conivaptan is given short-term in hospital, the effect is likely transient but could cause cholinergic effects like bradycardia.
How serious is the interaction between Conivaptan and Donepezil?
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 heart rate and gastrointestinal tolerance during conivaptan infusion. Consider holding donepezil temporarily if bradycardia or marked nausea occurs.
What other medicines interact with Donepezil?
MediHelp also lists interactions of Donepezil with, for example, Dronedarone, Pimozide, Thioridazine. The full list is on the Donepezil page.
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