A quick way to grasp the ABC's of Kampo --- easy-to-understand answers to the most common questions and more. What scientific evidence is there for Kampo's effectiveness? A growing number of laboratory and clinical studies, including some double-blind studies, is validating Kampo's long record of safe and effective use. For example, within the last few years, four of Tsumura's Kampo formulations have been re-approved by Japan's Ministry of Health and Welfare after stringent reevaluation. And a considerable amount of positive clinical data has been accumulated since Kampo medicines were first approved for reimbursement by Japan's national health insurance.   Does Kampo have side effects? Generally speaking, Kampo medicines are gentle and slow-acting, and their relative freedom from side effects is one of the points differentiating them from Western-style drugs. However, it should be kept in mind that herbs are chemically-active substances and should be used with care. All users should pay attention to label information and cautions, and those under the care of a physician or who have serious medical conditions should exercise particular care.   Where can I obtain further information on Kampo? Detailed information about Kampo ingredients and formulations, as well as an overview of the principles of Kampo and an up-to-date bibiliography can be found in Japanese Herbal Medicine: The Healing Art of Kampo by Robert Rister (Avery Publishing Group, 1999). Although it focuses on menopause-related conditions, Kampo Treatment for Climacteric Disorders by Yoshiharu Shibata and Jean Wu (Paradigm Publications, 1997) contains enlightening general information about Kampo theory and practice. Kampo: How the Japanese Updated Traditional Herbal Medicine by Akira Tsumura (Japan Publications, U.S.A., 1991) includes case studies of Kampo patients.