If you have low menstrual flow and menopause caused by blood stasis, you can take this medicine orally to activate blood circulation and remove blood stasis. Generally, this drug needs to be taken immediately after ovulation, i.e. about 10-13 days before menstruation, and early menstruation does not occur after taking this drug. In case of early menstruation, it is usually caused by endocrine disorders and menstrual disorders, and the cause should be identified and treated accordingly.