Berberine is a quaternary ammonium salt from the protoberberine group of isoquinoline alkaloids. It is found in various plants, including *Berberis* (e.g., European barberry, Oregon grape), *Coptis chinensis* (goldthread), *Hydrastis canadensis* (goldenseal), and *Phellodendron amurense* (Amur cork tree). Historically, berberine-containing plants have been used in traditional medicine for centuries, particularly in Chinese and Ayurvedic medicine, for their purported antimicrobial and anti-inflammatory properties. In recent decades, scientific interest in berberine has grown significantly, leading to numerous studies investigating its effects on various physiological processes, particularly those related to metabolic health. Berberine is typically encountered as a yellow, crystalline powder. As a supplement, it is available in various forms, primarily as capsules or tablets, and is often standardized to contain a specific percentage of berberine hydrochloride or berberine sulfate. (NIH ODS, Examine.com)
Deep dive
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Known interactions
Compound-pair rule
Caution
Both lower blood sugar, so combining may lower it more than expected.
Monitor blood sugar and discuss with your provider.
Category rule: glp1 × supplement
Note
GLP-1 medications slow stomach emptying, changing how/when oral supplements absorb; rapid weight loss raises the importance of protein and micronutrients.
Time oral supplements when nausea is lowest; prioritize protein and micronutrients; discuss with your provider.
Category rule: supplement × medication
Note
Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).
Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Compound-pair rule
Caution
Berberine inhibits CYP3A4 and P-glycoprotein, raising statin levels and myopathy risk.
Separate dosing and monitor for muscle pain; consider lower statin dose.
Compound-pair rule
Caution
Berberine inhibits CYP3A4 and P-glycoprotein, raising statin levels and myopathy risk.
Separate dosing and monitor for muscle pain; consider lower statin dose.
Compound-pair rule
Caution
Berberine inhibits CYP3A4 and P-glycoprotein, raising statin levels and myopathy risk.
Separate dosing and monitor for muscle pain; consider lower statin dose.
Compound-pair rule
Caution
Berberine inhibits CYP3A4 and P-glycoprotein, raising statin levels and myopathy risk.
Separate dosing and monitor for muscle pain; consider lower statin dose.
Compound-pair rule
Caution
Berberine inhibits CYP3A4 and P-glycoprotein, raising statin levels and myopathy risk.
Separate dosing and monitor for muscle pain; consider lower statin dose.
Compound-pair rule
Note
Both lower blood glucose; additive hypoglycemia risk possible.
Monitor glucose; reduce metformin dose if hypoglycemia occurs.
Frequently asked
Sources referenced
* Cochrane Library
* DrugBank
* Examine.com
* Mayo Clinic
* MedlinePlus
* National Institutes of Health (NIH) Office of Dietary Supplements (ODS)
* PubChem
Stackwise compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician.
Related compounds
Others in the supplement category or studied for the same goals.
