Black cohosh is used to treat menopausal symptoms, with a suggested dose of 40-80mg per day. It may also relieve inflammation and reduce bone loss, but more research is needed. It can cause side effects and liver damage, so consult a doctor before use.
For adults 18 years and older, the suggested dose of black cohosh is 40 to 80 milligrams (mg) per day in divided doses. Look for tablets that contain 1 milligram (mg) of standardized 27-deoxyactein. If you prefer an herbal tincture, the suggested dose is 0.4 to 2.0 milliliters (ml) of a 60% ethanol solution per day. Scientific evidence regarding the herb for the treatment of menopause uses 20 to 40 mg of Remifemin twice daily, or 40 drops of the liquid extract for up to 12 weeks. Remifemin is a black cohosh supplement that is promoted for menopause.
Black cohosh, also known as cohosh racemosa, is a popular herb used by the alternative medicine community to treat menopausal symptoms. Preliminary research suggests that it may relieve common symptoms such as mood swings, hot flashes, and vaginal dryness for up to six months. The means of action are unknown, and some studies indicate that it does not directly affect estrogen receptors. In general, the test results are inconclusive and more studies are needed. The safety for any dose of black cohosh has not been established for a period longer than six months.
In addition to its use in menopause, early studies indicate that black cohosh may relieve inflammation associated with arthritis. Tests showed that a dosage of black cohosh used in conjunction with other herbs was helpful. More studies are needed before recommendations can be made. Another condition for which the herb may be beneficial is osteoporosis. The estrogenic plant compounds in black cohosh may reduce bone loss, but again, more research is needed.
Some trials have studied the effects of a dose of black cohosh in breast cancer patients. Two studies showed that it was ineffective in relieving hot flashes caused by the cancer drug tamoxifen. Also, Yale scientists report that herbal supplements like this one can interfere with chemotherapy and radiation treatment. On the other hand, another study indicated protective effects against the growth of breast cancer by black cohosh. As more evidence is needed, you should consult with your doctor before taking this herb.
Although black cohosh supplements are generally well tolerated when taken within the recommended dosage range, long-lasting effects beyond six months have not been studied. Side effects include irregular or slow heart rate, low blood pressure, and intestinal disorders. High doses of the herb can cause visual disturbances and dizziness. Severe cases of liver damage and liver failure have been reported, so if you have liver disease, you should consult your doctor before taking this herb. It should also be used with caution by anyone with seizures, blood clots, or an allergy to aspirin.
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