Paustin, also known as levonorgestrel, cannot be taken before sex.
Levonorgestrel belongs to the short-acting oral contraceptives used afterward, should be taken orally within 72 hours after intercourse, the earlier the time of taking the drug, the better the contraceptive effect, can not be used for contraception beforehand.
The contraceptive mechanism of levonorgestrel is to inhibit ovulation to prevent the pregnant egg from implanting, increase the consistency of cervical mucus, and increase the resistance to sperm penetration, thus exerting a quick-acting contraceptive effect.
Attention, known or suspected pregnancy is prohibited; breast cancer, cancer of reproductive organs, abnormal liver function or recent liver disease, hypertension, jaundice history, venous thrombosis, cardiovascular disease, diabetes mellitus, cerebrovascular accidents, hyperlipidaemia, psychiatric depression, women over the age of 40 years should also be prohibited.
Remember, this product is used as an emergency remedial contraceptive after contraceptive failure, cannot be taken beforehand, usually has no contraceptive effect, and cannot be used frequently as a regular contraceptive method.