Sometimes the menstrual flow is scanty, but more often it is profuse and accompanied by severe bearing down, intermittent and expulsive pains. Few agents give greater relief in such conditions. In cases in which the menses are imperfect in function and pale in quality, and there is an associated cardiac disturbance, usually palpitation; and in some cases of amenorrhea, in anemic girls with pallor and subject to intermittent cramping pain, the action of the drug is very positive.