Paustin contraceptive pill, or levonorgestrel tablet, is an emergency contraceptive. This medication is taken after unprotected intercourse and in case of contraceptive failure, the first tablet is taken within 72 hours and the second tablet is taken after an interval of 12-16 hours. If you experience vomiting within two hours of taking the medication, you should immediately take another supplemental tablet of the medication. Some people may experience adverse reactions such as mild nausea, vomiting, abnormal uterine bleeding and breast tenderness after taking levonorgestrel tablets. It is contraindicated for those who are allergic to this drug, and allergy sufferers should use this product with caution. It should be noted that the consumption may lead to changes in the menstrual cycle, emergency contraceptive pills also have the possibility of contraceptive failure, if the menstrual period is delayed for a week, you should go to the hospital to do a checkup to confirm whether pregnancy.