Dydrogesterone is a hormone drug, which belongs to progestin, and is often used clinically for the corresponding symptoms caused by endogenous progesterone deficiency, such as dysmenorrhea, endometriosis, or for the treatment of shortened menstrual cycles caused by progesterone deficiency, or for the treatment of pre-eclampsia and habitual miscarriage. It is recommended to use the medication accordingly under the guidance of a doctor. Moreover, there is a possibility that dizziness may occur after taking didrogestrel, so it is better to take it before going to bed. However, didrogestrel tablets have no direct contraceptive effect. If used for contraception, you can take short-acting contraceptive pills or take emergency contraceptive pills after intercourse to prevent pregnancy. In addition, the intrauterine device will also play a very good contraceptive effect, and the use of condoms during the whole process of intercourse, can achieve the corresponding contraceptive purpose, so do not use the dydrogesterone tablets contraception, often will fail. It is not possible to miss a dose during the administration of dydrogesterone, as irregular vaginal bleeding may occur in the event of a missed dose. In addition, the corresponding clinical symptoms will not be relieved and the corresponding therapeutic purpose will not be achieved. It is better to take drospirenone at a fixed time every day when taking it for better effect.