Is Berberine Safe with Metformin?
Free · No account · based on published sources including NIH ODS, FDA drug labels, and peer-reviewed literature
Dual mechanism (AMPK activation plus OCT1/2 inhibition may increase metformin levels), but meta-analysis data show no significant increase in hypoglycemia risk. Monitor glucose if combining; use only with clinician oversight.
Why this interaction occurs
Berberine lowers glucose via AMPK and may inhibit OCT1/2 transporters, potentially raising metformin exposure. Combined hypoglycemia risk appears limited in meta-analytic data, but glucose monitoring is prudent.
Evidence
Evidence level: moderate.
Data source
Yin et al., EClinicalMedicine 2022 (meta-analysis); OCT transporter literature
Reported safety data
The FDA’s adverse event reporting system (FAERS) has received 432,898 reports mentioning Metformin. This reflects reported cases involving the medication in general — not confirmed causation, and not specific to the Metformin + 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 Berberine interactions → · All Metformin interactions →
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Educational only — not medical advice.
Always confirm with your doctor or pharmacist.