Short-acting contraceptives are usually effective after 7 days of continuous use, depending on the purpose of the pill and the body’s sensitivity to it. Short-acting contraceptive pills are mainly composed of estrogen and progestin, and can be used not only for contraception but also for menstrual disorders. When used for contraception, it is usually taken on the 5th day of menstruation, and it is recommended to take it at the same time every day to avoid abnormal bleeding and other adverse reactions due to irregular timing of use. Usually after 1 week of continuous use, it can be used as a contraceptive. If used to treat irregular menstruation, you can usually stop taking the pill for about 3-7 days after taking it for about 3 weeks in a row. However, it should be noted that liver and kidney function tests and gynecological examinations should be performed before taking short-acting contraceptives to determine whether there are any abnormalities in the body. If you experience a small amount of vaginal bleeding while taking the Pill, it is usually a normal side effect of the drug and can be observed first.