What are the different types of oral emergency contraceptives? What are they? Emergency contraceptives mainly include two categories, the most commonly used category is progestin alone, the active ingredient is levonorgestrel. These pills are represented by Yutin, Antin, Huitin, and Danmi, all of which are over-the-counter drugs. The other type of emergency contraceptive is anti-progestational drugs, the active ingredient of which is mifepristone. The most commonly used one is Postdinol, and there are also Simeon tablets, Restinan tablets, Farnesol, and Walden, all of which are prescription drugs. How to take levonorgestrel? Levonorgestrel is usually used in two ways: 1. single dose: one tablet (1.5mg) within 72 hours after unprotected intercourse; 2. divided dose: one tablet (0.75mg) within 72 hours after unprotected intercourse, followed by one tablet (0.75mg) 12h apart. The results of clinical trials showed that there was no significant difference in the contraceptive effect between the two uses. The earlier levonorgestrel is taken after sexual intercourse, the more effective it is. Regardless of the dose, those who experience vomiting within 1 hour after taking the drug should take one additional tablet. How do I take mifepristone? There are two ways to take mifepristone: 1. single dose: one pill (25mg) within 72 hours after unprotected intercourse; 2. divided dose: one pill (10mg) within 72 hours after unprotected intercourse, followed by one pill (10mg) 12 hours apart). Clinical trials have shown no significant difference in contraceptive efficacy between the two uses. Mifepristone should be taken on an empty stomach 2 hours before and after administration. Regardless of the dose, those who vomit within 1 hour after taking the drug should take one additional tablet.