Black Cohosh Root also known as black bugbane, black snakeroot and fairy candle is a plant common to North America. This herb has long been used by Native Americans for its medicinal properties. It is used to cure such things as gynecological conditions, sore throats, kidney problems and depression. It is used today to treat menopause, premenstrual tension, and other gynecological problems. Recent research suggests that this herb binds and activates serotonin receptors and also a derivative called N-mthylserotonin with a high affinity to serotonin receptors has been found in it . This is what makes it effective in the treatment of depression.