Berberine interacts with several medication classes through CYP enzyme inhibition (CYP3A4, CYP2D6) and pharmacodynamic effects. Always consult your doctor before combining berberine with any prescription medication.
High-Risk Interactions (Do NOT Combine Without Doctor)
| Medication | Risk | Why |
|---|---|---|
| Metformin | High | Both lower blood sugar — combined hypoglycemia risk |
| Insulin | High | Severe hypoglycemia risk |
| Warfarin / Blood Thinners | High | CYP enzyme competition — altered drug levels |
| Cyclosporine | High | Berberine increases cyclosporine blood levels |
Moderate Interactions (Use Caution)
- Statins — CYP3A4 competition; increased statin side effects possible
- Blood pressure medications — additive hypotensive effect
- Antibiotics (macrolides) — CYP3A4 overlap
Generally Safe Combinations
- Inositol (complementary for PCOS)
- Vitamin D
- Omega-3 fatty acids
- Probiotics
References: Yin 2008 PMID:18510766 | Zhang 2008 PMID:18397984 | Wei 2012 PMID:22019891 | Kong 2004 PMID:15531889
*Not evaluated by FDA.