The generic name of Jin Yuting is levonorgestrel tablets, which are taken within 72 hours of intercourse, and the earlier they are taken the better the results. Levonorgestrel tablets are a progestational hormone drug that provides emergency contraception and is generally required to be taken within 72 hours of unprotected intercourse, and the earlier it is taken, the better the results. When taking levonorgestrel tablets, it is generally recommended to take on an empty stomach. This is because there is a possibility of mild nausea and vomiting after taking this medication. Nausea and vomiting are more likely to occur after taking the medicine if it is not taken on an empty stomach. If vomiting occurs within two hours, it may affect the contraceptive effect of the drug and a replacement tablet should be taken immediately. After taking levonorgestrel tablets, it is possible that the next menstrual period may be brought forward or delayed. If your period is delayed, you need to check if you are pregnant. Emergency contraceptive pills can only be used as a remedy for contraceptive failure and should not be taken regularly, and the use of the drug should be strictly in accordance with medical advice.