- Black cohosh is used for menopause-related symptoms such as hot flashes, mood swings, vaginal dryness and night sweats. It is also used for menstrual-related conditions, including cramps and bloating. Some studies have shown that the efficacy of black cohosh lasts for up to six months.
- There is no conclusive evidence as to how black cohosh actually works. There are some studies that attempt to link black cohosh to having estrogen-like properties, yet there is still conflicting evidence regarding this link.
- Black cohosh comes in three forms: dried rhizomes (plant stems), liquid and tablets. Since black cohosh is not regulated by the FDA, there is no verified recommended dosage. However, there are studies that have suggested 200 milligrams of dried rhizome daily in divided doses, 0.4 to 2 milliliters of 60 percent ethanol liquid daily and 20 milligram or 40 milligram tablets twice a day for menopause.
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While black cohosh is well tolerated, its safety has not been proven on women with hormone-sensitive conditions such as pregnancy, uterine fibroids, breast cancer or endometriosis.
High doses of black cohosh may cause headache, perspiration, dizziness, nausea, vomiting, heaviness in the legs and constipation. - Even though black cohosh is an herbal supplement, users should take precautions when using certain medications to prevent adverse drug interactions. For example certain antidepressants such as Norpramin and Elavil may increase in the blood if using black cohosh. Another common drug, codeine, may have an adverse impact on the body if used with black cohosh. All medications and natural herbal supplements such as black cohosh should be discussed with medical professionals.
