Occasional emergency contraceptive pills are not harmful to the body and there is no need to worry too much. First of all, in the absence of contraceptive measures or contraceptive measures failed, such as condom slip, rupture, or after the occurrence of non-willing sex, you can follow medical advice oral emergency contraceptive pills for contraception, generally stop 7 days after the drug is basically metabolized. Secondly, emergency contraceptive pills mainly include mifepristone, levonorgestrel and estrogen and progestin complexes. The oral emergency contraceptive pill has a good safety profile, and for healthy women, taking the pill once in a while will not increase the risk of infertility or teratogenicity, nor will it increase the risk of disease. However, since most of the commercially available emergency contraceptives are steroid hormones and are taken at once, they may irritate the gastrointestinal tract and cause nausea and vomiting after taking them. In addition, a few women may experience vaginal bleeding after taking the pill, which usually disappears after a few days and is not a cause for concern. If the vaginal bleeding does not go away, you can go to the hospital for medical treatment. In addition, it is important that you do not have unprotected sex after taking the emergency contraceptive pill until your next period, otherwise the probability of contraceptive failure is very high. The emergency contraceptive pill is a one-time remedy and should not be used as a regular contraceptive method. If used frequently, it can easily cause hormonal disorders in the body and even affect future fertility.