What are the 72-hour emergency contraceptive pills?

72-hour emergency contraceptives mainly include levonorgestrel enteric-coated capsules, mifepristone tablets, and combined estrogen-progestin preparations. Levonorgestrel enteric-coated capsules are a common type of emergency contraceptive, with levonorgestrel as the active ingredient. They are suitable for women following unprotected sexual intercourse and offer relatively effective contraception. However, they are not appropriate for all women and may cause menstrual periods to occur earlier or later than expected. Mifepristone tablets are progesterone receptor antagonists that prevent pregnancy by inhibiting ovulation and implantation of the fertilized egg. Mild side effects such as nausea and vomiting may occur after taking the medication. Combined estrogen-progestin preparations, such as norethisterone enanthate oral solution, are short-acting oral contraceptives that can also be used for emergency contraception. Emergency contraceptives should not be used as a regular method of birth control and must be used with caution. It is recommended to use these medications under the guidance of a qualified healthcare provider.