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Feverfew (Tanacetum parthenium) leaves have long been used orally for the treatment or prevention of headache, and there is a scientific basis for this use. Pre-clinical studies have reported anti-inflammatory and blood vessel dilation (opening) effects. Several controlled human trials have been conducted in this area with mixed results. Overall, these studies suggest that feverfew taken daily as standardized capsules may reduce the incidence of attacks in patients who experience chronic migraine headaches. Feverfew may cause an increase in bleeding and drug interactions. Do not use feverfew if pregnant or nursing, or if allergic to plants in the aster family, including ragweed, marigolds, daisies, and chrysanthemums. Copyright ‚© 2007 Natural Standard Inc.
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