Eusynthroid, also known as drospirenone ethinyl estradiol tablets, is an oral short-acting contraceptive pill for women. Menstruation usually occurs 3-7 days after stopping the pill. It is a combination of estrogen and progestin, which is mainly used for contraception, but also for endometrial repair and menstrual adjustment after abortion. The simultaneous action of estrogen and progestin can promote the growth and transformation of the endometrium, thus playing a role in repairing the endometrium and also adjusting menstruation. Patients usually stop taking this drug for 3-7 days after menstruation. At the time of normal menstruation, if oral administration is required for the next month’s cycle, oral administration can be started from the first day of menstruation. Menstruation usually occurs within one week after stopping one cycle of this medication, unless there is a missed dose. If the patient does not have a period after one week of stopping the medication, it is recommended to have an early pregnancy test, etc. Therefore, to ensure the action of the drug, patients should pay attention to the dosage and are advised to take it at the same time every day without any missed doses.