Levonorgestrel enteric coated tablets are women's emergency contraceptives. After unprotected sex or other contraceptive methods fail, they are taken orally within 72 hours of sexual life. Generally, the earlier you take them, the better the contraceptive effect will be. After taking the emergency contraceptives, some women will also have irregular vaginal bleeding, which has a certain relationship with the fluctuation of hormone levels in their bodies. Some women will also have mild nausea, vomiting, breast tenderness, headache, dizziness and other symptoms. When the symptoms are mild, no special treatment is generally required. With the metabolism of drugs, they can disappear automatically. When the symptoms are serious, they should seek medical advice in time. However, oral emergency contraceptives can only be used as emergency contraception after contraceptive errors, not as conventional contraception. If there is no pregnancy preparation plan in the short term, women should choose other methods for contraception.