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What are risk of taking guarana?

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High doses of caffeine may raise the risk of increased heart rate, breast disease, and high blood pressure. An overdose of caffeine can cause seizures and convulsions. Talk to your doctor before using guarana if you have high blood pressure, anxiety disorders, glaucoma, osteoporosis, heart problems, bleeding disorders, diabetes, kidney problems, or liver disease. At least one death has been reported in a young woman with mitral valve prolapse who drank a guarana-containing drink. People with MVP should speak to their doctor before using guarana.

From: Guarana WebMD Medical Reference

SOURCES:  Memorial Sloan-Kettering Cancer Center web site: “About Herbs: Guarana.” Natural Medicines Comprehensive Database web site: “Guarana.” Natural Standard Patient Monograph: “Guarana.” Duke, J. CRC Press, 1985. Cannon, M. 2001.
CRC Handbook of Medicinal Herbs, The Medical Journal of Australia,



Reviewed by Carmen Patrick Mohan on May 11, 2017

SOURCES:  Memorial Sloan-Kettering Cancer Center web site: “About Herbs: Guarana.” Natural Medicines Comprehensive Database web site: “Guarana.” Natural Standard Patient Monograph: “Guarana.” Duke, J. CRC Press, 1985. Cannon, M. 2001.
CRC Handbook of Medicinal Herbs, The Medical Journal of Australia,



Reviewed by Carmen Patrick Mohan on May 11, 2017

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How does gurana interact with medications?

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