Safety Profile
Overall safety rating: Generally Safe
Berberine (Weight Management) Side Effects & Safety
Evidence:Strong
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Potential Side Effects
- GI discomfort (diarrhea, constipation, bloating, cramping) — the most common side effect
- Possible hypoglycemia when combined with diabetes medications
- May cause fatigue due to AMPK activation reducing gluconeogenesis
- Rare heartburn
Drug & Supplement Interactions
- Metformin — additive blood sugar lowering; increased risk of hypoglycemia and lactic acidosis
- CYP3A4, CYP2D6 substrates — berberine inhibits these enzymes and may increase drug levels
- Cyclosporine — berberine significantly increases cyclosporine blood levels
- Diabetes medications (sulfonylureas, insulin) — increased hypoglycemia risk
- Statins — may increase statin blood levels through CYP3A4 inhibition
Maximum Dose
Do not exceed: 1,500 mg/day of berberine HCl; GI side effects increase at higher doses