It is suitable to start taking it about a week before the menstrual period, when the menstrual period should be stopped and not suitable to continue taking it. The prolonged pill belongs to the Chinese medicine preparation, need to go through the dialectic before taking, and is not suitable for every irregular menstrual women to take, it is best to take under the guidance of experienced herbalists, not personal blind medication. You should not take cold, cold food, especially not a cold shower, if it is during the cold period can not take the free pill. The best way to improve menstrual disorders is through diet and adjust the mind and body, do not rely too much on drugs. If you take prozac for a long time to regulate menstruation will cause dependence, but also increase the adverse reactions and side effects of prozac, which is harmful to the body.