The above situation may occur when the patient is in menopause, or when the medication is not in accordance with the patient’s type of evidence, or when the medication is used for a shorter period of time, etc. In addition, if the patient is combined with other organic diseases may also lead to failure of menstrual regulation, it is recommended to consult a doctor in a timely manner to clarify the specific causes and take targeted treatment, so as not to delay the condition. 1. In menopause: After the age of 45, women are less effective in applying menopause medication. The effect of the application of menstrual regulation drugs is poor, because 45-48-year-old women gradually menopause, which is a physiological phenomenon. If a perimenopausal woman does not have menstruation when taking menstrual regulating drugs, it may be normal menopause; 2. The medication does not match the patient’s type of evidence: for example, menstrual disorders or menstrual failure of the qi and blood weakness type, it is difficult to achieve the efficacy of drugs that simply regulate the liver and spleen. It usually takes a longer time to maintain the effect of a course of treatment. The Chinese medicine for menstruation is usually available for about 1 month or longer, so you need to be patient enough; 4. organic diseases: if you still do not have a period after taking the Chinese medicine for menstruation, it may be caused by organic diseases, such as ovarian diseases and uterine diseases, so you need to solve the original disease and take targeted treatment; 5. other: if you take hormonal drugs such as progesterone during drinking the Chinese medicine for menstruation, the endometrium may become abnormally thickened, affecting the effect of the Chinese medicine. This will affect the effect of the herbal medicine and lead to the non-arrival of menstruation. Women with normal sex life also need to exclude the possibility of pregnancy, if they are already pregnant, they will not get their periods, so they need to stop taking menstrual regulating herbs and consult their doctor for follow-up treatment in time.