Kun Ling Pills to regulate menstruation usually need to be taken for 3 cycles, i.e. 3 months, while each cycle needs to be taken for 20 days. Kun Ling Wan belongs to a kind of proprietary Chinese medicine, which is commonly used in the treatment of menstrual cycle disorders, dysmenorrhea, habitual abortion, and lumbar and knee pain. In regulating menstruation, it is generally recommended to start taking the medicine orally from the 5th day of menstruation for 20 days, and then stop taking the medicine, and menstruation may usually come in 7~10 days after stopping the medicine. If necessary, it can also be taken together with short-acting contraceptive pills under doctor’s supervision. It is usually necessary to take at least 3 cycles, i.e. 3 months to achieve the purpose of treatment. People who are allergic to this drug are prohibited from using it to regulate menstruation. When using Kunling Pills to regulate menstruation, it is recommended to follow the doctor’s instructions and take it in full dosage and course of treatment. However, if any adverse reactions such as nausea, dizziness, etc. occur during the use of the drug, it is recommended to consult a doctor promptly.