On this page Introduction What It Is Used For How It Is Used What the Science Says Side Effects and Cautions Sources For More Information
		© Steven Foster

Introduction

This fact sheet provides basic information about the herb kava--common names, uses, potential side effects, and resources for more information. Kava is native to the islands of the South Pacific and is a member of the pepper family.

Common Names--kava kava, awa, kava pepper

Latin Names--Piper methysticum

Top

What It Is Used For

• Kava has been used as a ceremonial beverage in the South Pacific for centuries.
• Kava has also been used to help people fall asleep and fight fatigue, as well as to treat asthma and urinary tract infections.
• Topically (on the skin), kava has been used as a numbing agent.
• Today, kava is used primarily for anxiety, insomnia, and menopausal symptoms.

Top

How It Is Used

The root and rhizome (underground stem) of kava are used to prepare beverages, extracts, capsules, tablets, and topical solutions.

Top

What the Science Says

• Although scientific studies provide some evidence that kava may be beneficial for the management of anxiety, the U.S. Food and Drug Administration (FDA) has issued a warning that using kava supplements has been linked to a risk of severe liver damage.
• Kava is not a proven therapy for other uses.
• NCCAM-funded studies on kava were suspended after the FDA issued its warning.

Top

Side Effects and Cautions

• Kava has been reported to cause liver damage, including hepatitis and liver failure (which can cause death).
• Kava has been associated with several cases of dystonia (abnormal muscle spasm or involuntary muscle movements).
• Kava may interact with several drugs, including drugs used for Parkinson's disease.
• Long-term and/or heavy use of kava may result in scaly, yellowed skin.
• Avoid driving and operating heavy machinery while taking kava because the herb has been reported to cause drowsiness.
• Tell your health care providers about any herb or dietary supplement you are using, including kava. This helps to ensure safe and coordinated care.

Top

Sources

National Center for Complementary and Alternative Medicine. Kava Linked to Liver Damage. National Center for Complementary and Alternative Medicine Web site. Accessed at http://nccam.nih.gov/health/alerts/kava/ on March 30, 2006.

Kava. Natural Medicines Comprehensive Database Web site. Accessed March 30, 2006.

Kava (Piper methysticum G. Forst). Natural Standard Database Web site. Accessed March 30, 2006.

Kava kava rhizome (root). In: Blumenthal M, Goldberg A, Brinckman J, eds. Herbal Medicine: Expanded Commission E Monographs. Newton, MA: Lippincott Williams & Wilkins; 2000:221-225.

Kava (Piper methysticum). In: Coates P, Blackman M, Cragg G, et al., eds. Encyclopedia of Dietary Supplements. New York, NY: Marcel Dekker; 2005:373-380.

Food and Drug Administration. Kava-Containing Dietary Supplements May Be Associated With Severe Liver Injury. Food and Drug Administration Web site. Accessed at http://www.cfsan.fda.gov/~dms/addskava.html on March 30, 2006.

Pittler MH, Ernst E. Kava extract versus placebo for treating anxiety. Cochrane Database of Systematic Reviews. 2003;(1):CD003383. Accessed at http://www.cochrane.org on April 25, 2006.

Top

For More Information

Visit the NCCAM Web site and view:

• "What's in the Bottle? An Introduction to Dietary Supplements"
• "Herbal Supplements: Consider Safety, Too"

NCCAM Clearinghouse
Toll-free in the U.S.: 1-888-644-6226
TTY (for deaf and hard-of-hearing callers): 1-866-464-3615
E-mail: info@nccam.nih.gov

CAM on PubMed
Web site: nccam.nih.gov/camonpubmed/

NIH Office of Dietary Supplements
Web site: ods.od.nih.gov

Top

This publication is not copyrighted and is in the public domain. Duplication is encouraged.

NCCAM Publication No. D314
May 2006

Top