Berberine for Cancer: Safety & Side Effects

This page covers safety information for Berberine. See our complete Berberine therapy guide →

Author

Olivia Pearman is an experienced researcher who is passionate about access to scientific information. She has over a decade of research experience with a PhD from the University of Colorado at Boulder, a Master’s from the Yale School of the Environment, and a Bachelor of Science from Clemson University. Throughout her career, she has honed her skills in translating research for all audiences and is thrilled to work with CancerChoices to help make scientific knowledge available for everybody.

Olivia Pearman, PhD Research Associate

Clinical reviewer

Laura Pole, MSN, RN, OCNS

Senior Clinical Consultant
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Laura Pole is senior clinical consultant for CancerChoices. Laura is an oncology clinical nurse specialist who has been providing integrative oncology clinical care, navigation, consultation, and education services for over 40 years. She is the co-creator and co-coordinator of the Integrative Oncology Navigation Training at Smith Center for Healing and the Arts in Washington, DC. Laura also manages the “Media Watch Cancer News That You Can Use” listserv for Smith Center/Commonweal. In her role as a palliative care educator and consultant, Laura has served as statewide Respecting Choices Faculty for the Virginia POST (Physician Orders for Scope of Treatment) Collaborative as well as provided statewide professional education on palliative and end-of-life care for the Virginia Association for Hospices and Palliative Care.

For CancerChoices, Laura curates content and research, networks with clinical and organizational partners, brings awareness and education of integrative oncology at professional and patient conferences and programs, and translates research into information relevant to the patient experience as well as clinical practice.

Laura sees her work with CancerChoices as a perfect alignment of all her passions, knowledge and skills in integrative oncology care. She is honored to serve you.

Laura Pole, MSN, RN, OCNS Senior Clinical Consultant

Last update: July 1, 2026

Side effects and adverse reactions

Few serious adverse events have been seen in studies using berberine.1Fang S, Guo S et al. Efficacy and safety of berberine in preventing recurrence of colorectal adenomas: a systematic review and meta-analysis. Journal of Ethnopharmacology. 2022;282:114617; Qiu Y, Li M et al. Berberine treatment for weight gain in patients with schizophrenia by regulating leptin rather than adiponectin. Asian Journal of Psychiatry. 2022;67:102896; Zhao JV, Yeung WF et al. Effect of berberine on cardiovascular disease risk factors: a mechanistic randomized controlled trial. Nutrients. 2021;13(8):2550; Mirzaee F, Razmjouei P et al. The effect and safety of berberine on polycystic ovary syndrome: a systematic review. Journal of Obstetrics and Gynaecology. 2021;41(5):684-689; Meng S, Wang LS et al. Berberine ameliorates inflammation in patients with acute coronary syndrome following percutaneous coronary intervention. Clinical and Experimental Pharmacology and Physiology. 2012 May;39(5):406-11; Chan M, Qin Z et al. Adjunctive berberine reduces antipsychotic-associated weight gain and metabolic syndrome in patients with schizophrenia: a randomized controlled trial [published correction appears in Psychiatry and Clinical Neurosciences. 2022 Oct;76(10):536]. Psychiatry and Clinical Neurosciences. 2022;76(3):77-85; Chen C, Tao C et al. A randomized clinical trial of berberine hydrochloride in patients with diarrhea-predominant irritable bowel syndrome. Phytotherapy Research. 2015;29(11):1822-1827; Rabbani GH, Butler T, Knight J, Sanyal SC, Alam K. Randomized controlled trial of berberine sulfate therapy for diarrhea due to enterotoxigenic Escherichia coli and Vibrio cholerae. Journal of Infectious Diseases. 1987;155(5):979-984; Cicero AF, Tartagni E et al. Combined nutraceutical approach to postmenopausal syndrome and vascular remodeling biomarkers. Journal of Alternative and Complementary Medicine. 2013;19(6):582-587; Zhang J, Han C et al. A randomized, multicenter and noninferiority study of amoxicillin plus berberine vs tetracycline plus furazolidone in quadruple therapy for Helicobacter pylori rescue treatment. Journal of Digestive Diseases. 2020;21(5):256-263; An Y, Sun Z et al. The use of berberine for women with polycystic ovary syndrome undergoing IVF treatment. Clinical Endocrinology (Oxford). 2014;80(3):425-431; Chen XX, Chen YX et al. Efficacy and safety of triple therapy containing berberine hydrochloride, amoxicillin, and rabeprazole in the eradication of Helicobacter pylori. Journal of Digestive Diseases. 2022;23(10):568-576. The most common side effects are gastrointestinal, including nausea, abdominal distension, constipation, or diarrhea.2Li Z, Wang Y et al. Berberine and health outcomes: An umbrella review. Phytotherapy Research. 2023 May;37(5):2051-2066; Di Pierro F, Bertuccioli A, Giuberti R, Saponara M, Ivaldi L. Role of a berberine-based nutritional supplement in reducing diarrhea in subjects with functional gastrointestinal disorders. Minerva Gastroenterologica e Dietologica. 2020;66(1):29-34; Zhang Y, Gu Y et al. Gut microbiome-related effects of berberine and probiotics on type 2 diabetes (the PREMOTE study). Nature Communications. 2020;11(1):5015; Harrison SA, Gunn N et al. A phase 2, proof of concept, randomised controlled trial of berberine ursodeoxycholate in patients with presumed non-alcoholic steatohepatitis and type 2 diabetes. Nature Communications. 2021;12(1):5503; Dong H, Wang N, Zhao L, Lu F. Berberine in the treatment of type 2 diabetes mellitus: a systemic review and meta-analysis. Evidence-based Complementary and Alternative Medicine. 2012;2012:591654; Yan HM, Xia MF et al. Efficacy of berberine in patients with non-alcoholic fatty liver disease. PLoS One. 2015;10(8):e0134172.e. One case of a rash was reported.3Zhang BY, Chen M et al. Berberine reduces circulating inflammatory mediators in patients with severe COVID-19. British Journal of Surgery. 2021;108(1):e9-e11.

Contraindications

Berberine should not be used when pregnant or breastfeeding.4Fan J, Zhang K, et al. Pharmacological effects of berberine on mood disorders. Journal of Cellular and Molecular Medicine. Jan 2019;23(1):21-28.

Drug interactions 

There are known drug interactions with this therapy. Interactions with medications and other interventions are complex. Always consult with a healthcare professional before adding any new therapy to your regimen. To learn more about interactions visit one of the trusted resources below: 

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