Yuting generic name levonorgestrel tablets, ovulation contraceptive failure within 72 hours to eat levonorgestrel tablets useful, levonorgestrel tablets have adverse reactions, contraindications, need to be guided by a doctor to use the drug. Levonorgestrel tablets is a kind of emergency contraceptive, with contraceptive effect, but levonorgestrel tablets only in unprotected sex or contraceptive failure within 72 hours after taking effective, ovulation contraceptive failure more than 72 hours to eat levonorgestrel tablets have no effect. Taking levonorgestrel tablets can produce certain adverse effects, including symptoms such as early menstruation, delayed menstruation, mild nausea, headache, fatigue, vomiting, and abnormal uterine bleeding. It is contraindicated for those with known or suspected pregnancy, those with a history of cancer of the reproductive organs, abnormal liver function, hypertension, cardiovascular disease, etc., and those who are allergic to the ingredients of levonorgestrel tablets. Ovulation contraceptive failure to take levonorgestrel tablets should be guided by a doctor, not arbitrary abuse.