Misuse of contraceptive pills may lead to temporary endocrine disorders, ovarian ovulation dysfunction and increased risk of ectopic pregnancy. 1. Temporary endocrine disorders: Usually when patients take contraceptive pills by mistake, it may lead to temporary endocrine disorders, such as irregular vaginal bleeding, delayed menstruation, gastrointestinal discomfort, dizziness and other phenomena. 2. Ovarian ovulation dysfunction: Generally, high potency progesterone can inhibit ovarian ovulation, and patients who mistakenly take birth control pills will break the natural ovarian ovulation law, causing ovarian ovulation dysfunction. 3. Increase the risk of ectopic pregnancy: usually emergency contraceptive pills can only be taken once a month, not more than three times a year. If the use of emergency contraceptive pills is not standardized, it may lead to abnormal implantation of fertilized eggs and increase the risk of ectopic pregnancy. Patients who experience any of the above adverse reactions are advised to seek prompt medical attention to avoid delays.