(Caulophyllum thalictroides) Used by North American Indians for cramps and menstrual problems. Current research validates that indeed blue cohosh can be useful in regulating the female menstrual cycle and is helpful in relieving painful menstruation. Blue Cohosh also acts to stimulate uterine muscles to advance a delayed childbirth. It helps to relax the uterus so that delivery is easier, thus preventing pain and exhaustion; it’s also effective in reducing inflammation of the uterus. A blue cohosh poultice can be used as an emergency remedy for allergic reactions to bee stings.