Black cohosh relieves hot flashes, heart palpitations, sleep problems and night sweats in some menopausal women. Black cohosh supplements are prescribed for hormonal therapy in Germany. Studies done on black cohosh resulted in mixed conclusions as to its efficacy, according to WebMD.
Black cohosh roots and rhizomes are used to make teas, tablets and supplemental extracts to treat migraines, mood disorders and vaginal dryness associated with menopause. Standardized extracts and tinctures are available without a prescription in the United States, explains About.com.
Black cohosh, also known as Cimicifuga racemosa, is a member of the buttercup family. It is native to the central and eastern parts of North America, where indigenous people used it as medicine to treat menstrual cramps, indigestion, muscle pain and menopausal conditions, according to About.com.