The side effects of emergency contraceptive pills are still very big if taken twice a month, because they are highly effective progestins, and the mechanism of contraception is mainly to inhibit ovulation and cause abnormal thickening of the endometrium to prevent the fertilized egg from being laid, which can lead to endocrine disorders and menstrual disorders. If you take the pill twice in a month, it is more likely to cause endocrine disorders and may cause damage to liver and kidney functions. It is recommended to take the emergency contraceptive pill twice a year, not more.