Generally, there are different times to take the medications prepared by doctors to regulate menstruation and it is recommended to follow the doctor’s instructions. For people with weak constitution and poor gastrointestinal condition, it may be common to choose to take the medication half an hour after meals in order to reduce the irritation of the medication. Common clinical causes of menstrual regulation include dysmenorrhea, low menstrual flow and irregular menstrual cycles, and the preparation of menstrual regulation herbs will vary according to the type of cause, severity of the condition, the patient’s constitution and sensitivity to drugs. When patients have dysmenorrhea and low menstrual flow, they can take the medicine during their periods. However, it should be noted that when the menstrual flow is too heavy and the period is prolonged, you need to stop taking it during the period. In addition, patients should try not to buy menstrual regulating drugs on their own, but should consult a gynecologist or a Chinese medicine doctor to prepare the medication according to their specific condition, so as not to delay their condition by taking the medication on their own. While taking menstrual regulating drugs, patients should try not to eat spicy and cold foods, not to touch sweet and greasy foods, to work and rest regularly, and to maintain a good mental state.