Levonorgestrel tablets should not be taken by women over 50 years of age. Levonorgestrel tablets are a kind of emergency contraceptive pills, according to the regulations, women over 40 years old are not allowed to take them. This is because, after the age of 40, women will cause ovarian function decline, resulting in hormone secretion disorders in the body, so it is not recommended to take contraceptive pills, otherwise it is easy to lead to ovarian function inhibition, easy to cause vaginal bleeding, or even amenorrhea. Levonorgestrel tablets are mainly used in the clinic for emergency contraception for women, that is to say, they are used occasionally when women do not take protective measures or other contraceptive methods during coitus, and they can not be taken for a long time. The main common adverse reactions include nausea, vomiting, diarrhea, tinnitus and headache, etc. Levonorgestrel tablets are contraindicated in people who are allergic to them. The use of levonorgestrel tablets carries certain risks, and it is recommended that they be taken under the supervision of a doctor.