Is Bacopa Monnieri Safe with Donepezil?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Use with caution and only under neurologist supervision. Start Bacopa at the lowest effective dose if prescribed. Monitor for GI side effects such as nausea, diarrhea, or cramping, which may signal excess cholinergic activity.
Why this interaction occurs
Bacopa monnieri has demonstrated acetylcholinesterase inhibitory properties in human and animal studies, though weaker than pharmaceutical agents. When combined with donepezil, the additive inhibition of acetylcholine breakdown may increase cholinergic tone beyond the intended therapeutic level, worsening GI tolerability and potentially affecting heart rate.
Evidence
Evidence level: moderate.
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 25,232 reports mentioning Donepezil. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Donepezil + supplement combination on this page.
FAERS reports are voluntary and cannot prove that a drug caused an event. Do not use report counts to assess the safety of this specific drug-supplement pair.
Frequently asked questions
Related interactions
All Bacopa Monnieri interactions → · All Donepezil interactions →
Already checked this one — check your whole list
Educational only — not medical advice.
Always confirm with your doctor or pharmacist.