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What are side effects of guarana?

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The side effects of guarana are generally the same as the side effects of caffeine. They include sleep problems, anxiety, restlessness, upset stomach, and quickened heartbeat. Long-term use of caffeine may result in tolerance and psychological dependence.

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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What are risk of taking guarana?

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