What are the side effects of taking emergency contraceptive pills twice within 5 days?

Taking emergency contraceptive pills twice within 5 days may lead to the following side effects: 1. Menstrual disorders: The high hormone content in contraceptive pills may cause an imbalance in progesterone and estrogen secretion, leading to menstrual irregularities and delayed ovulation. 2. Irregular vaginal bleeding: Contraceptive pills can cause abnormal thickening of the endometrium, resulting in irregular vaginal bleeding. 3. Gastrointestinal discomfort: Some women may experience nausea, vomiting, abdominal pain, and other gastrointestinal symptoms. 4. Other adverse reactions: Dizziness, headaches, and breast tenderness may also occur. Additionally, emergency contraceptive pills are primarily metabolized in the liver, and long-term or excessive use may impair liver function. Moreover, due to their high hormonal content, frequent use may suppress the female reproductive endocrine system, leading to ovarian dysfunction, amenorrhea, premature ovarian failure, or even infertility. Therefore, women are advised not to frequently use emergency contraceptive pills, but instead opt for safer and more effective contraceptive methods.