Levonorgestrel tablets can be taken before or after meals, should be taken as soon as possible, the specific use of medication as prescribed by the doctor. Levonorgestrel tablets are fast-acting, short-acting contraceptives, suitable for emergency contraception when a woman has unprotected sex or other contraceptive methods fail by chance. The drug should be taken within 72 hours of the onset of indications, not explicitly required before or after meals, generally the earlier the drug, the better the effect of pregnancy prevention. The drug should be contraindicated in cases of hypersensitivity to the product, known or suspected pregnancy, with a recent history of liver disease or jaundice, abnormal liver function, breast cancer, cancer of the reproductive organs, cerebrovascular accidents, hypertension, hyperlipidemia, venous thrombosis, cardiovascular disease, diabetes mellitus, psychiatric depression, and women over 40 years of age. Menstrual changes may occur after the use of the drug, mostly manifested as early or delayed menstruation in the month of taking the drug, mild nausea, vomiting, headache, dizziness, breast distension, fatigue and other adverse reactions. Specific use of the drug should be under the guidance of a specialist, and should not be used without authorization.