Taking emergency contraceptive pills twice a month may lead to menstrual disorders, gastrointestinal discomfort and contraceptive failure. 1. Menstrual disorders: Emergency contraceptive pills are highly effective progestin drugs that inhibit ovulation and disrupt normal endocrine function to play the role of contraception, which has an impact on the reproductive endocrine system, leading to disorders in the female menstrual cycle and prolonged menstrual bleeding, taking emergency contraceptive pills twice a month will have a greater impact on menstruation. 2. Gastrointestinal discomfort: taking emergency contraceptive pills twice a month may cause gastrointestinal discomfort, such as nausea, vomiting, gastrointestinal flatulence and other discomforts. 3. Contraceptive failure: two times a month to take emergency contraceptive pills, does not rule out the possibility of contraceptive failure so that women unwanted pregnancy, after using the drug has not been menstruation should be considered to be pregnant. Do not take the emergency contraceptive pill as a regular contraceptive measures, its side effects are relatively large, may have an impact on women. If you experience menstrual disorders, gastrointestinal discomfort or other abnormalities after taking the pill, you should seek medical attention promptly.