Jin Yuting its active ingredient is levonorgestrel, 39-year-old women can be used as emergency remedial contraception, usually taken within 72 hours of sex, the sooner you take the better. Levonorgestrel is clinically used in women’s emergency contraception, by inhibiting ovulation and preventing the pregnant egg from implanting, and make the cervical mucus thicker, sperm is not easy to pass through and play a quick effect of contraception. It is usually used when unprotected or other contraceptive methods fail by chance. Adverse reactions such as nausea, vomiting, headache, dizziness and menstrual disorders may be caused after taking the drug. It should also be noted that it should be contraindicated in patients who are allergic to the product, have impaired liver or kidney function, are at risk of thrombosis, or have breast cancer. For women, if there is no need for childbearing, they can do a good job of contraception through condoms, birth control rings and other means to avoid the harm of unwanted pregnancy to the organism, and also take it under the guidance of a doctor, so as not to cause other adverse consequences.