NutriStack
Atorvastatin and Berberine, a caution.
Berberine has human evidence of inhibiting CYP3A4 activity after repeated dosing, and atorvastatin is partly cleared through CYP3A4. This could raise atorvastatin exposure and increase the chance of muscle symptoms, especially at higher statin doses or when other interacting drugs are present. Direct clinical outcome data for this exact pair are limited.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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At a glance
- Substances
- Atorvastatin and Berberine
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- Source citations
- 3 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Emerging evidence
Caution
What is happening. Berberine has human evidence of inhibiting CYP3A4 activity after repeated dosing, and atorvastatin is partly cleared through CYP3A4. This could raise atorvastatin exposure and increase the chance of muscle symptoms, especially at higher statin doses or when other interacting drugs are present. Direct clinical outcome data for this exact pair are limited.
Mechanism. Repeated berberine dosing reduced CYP3A4 probe activity in humans. Inhibition of CYP3A4 can increase exposure to atorvastatin and active metabolites, while experimental data suggest berberine-statin combinations may also affect hERG channel activity.
Recommendation. Do not start high-dose berberine with atorvastatin without a monitoring plan. Watch for new muscle pain, weakness, dark urine, or unusual fatigue, and consider using a non-CYP3A4 statin strategy if berberine is necessary.
Sources (3)
- Guo Y, Chen Y, Tan ZR, Klaassen CD, Zhou HH. Repeated administration of berberine inhibits cytochromes P450 in humans. Eur J Clin Pharmacol. 2012;68(2):213-217. PMID 21870106
- Feng P, Zhao L, Guo F, Zhang B, Fang L, Zhan G, et al. The enhancement of cardiotoxicity that results from inhibiton of CYP 3A4 activity and hERG channel by berberine in combination with statins. Chem Biol Interact. 2018;293:115-123. PMID 30086269
- Hirota T, Fujita Y, Ieiri I. An updated review of pharmacokinetic drug interactions and pharmacogenetics of statins. Expert Opin Drug Metab Toxicol. 2020;16(9):809-822. PMID 32729746
Stack Score
How this pair moves the number.
Effect on the composite score
If both Atorvastatin and Berberine are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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