Menstruation occurs 3-7 days after stopping the medication after taking dydrogesterone tablets. Dydrogesterone tablets is a kind of oral progesterone, used for the treatment of endogenous progesterone insufficiency induced by a variety of diseases, such as irregular menstrual cycle and dysfunction, etc., usually patients take 3-7 days after stopping the drug can have menstruation, this kind of vaginal bleeding belongs to the hormone after the use of the withdrawal of bleeding caused by. The common adverse reactions of Dydrogesterone Tablets include amenorrhea, vomiting, abdominal pain, edema and urticaria, etc. It is contraindicated in patients with herpes, porphyria and otosclerosis during pregnancy. The use of dydrogesterone tablets carries some risks and should be used under the supervision of a specialist.