After taking the emergency contraceptive pill an hour vomiting is recommended to make up for the drug, so as not to affect the effect of the drug. Emergency contraceptive pills belong to the aftermath of a remedial drug, after taking the drug within an hour of vomiting, the drug may not have been fully absorbed, which will affect the effect of emergency contraceptive pills, so to be safe, we need to make up for the drug in time, in order to effectively play the purpose of contraception. However, the emergency contraceptive pill contains a large number of progesterone components, after using the drug may lead to hormone level disorders in the body, thus affecting the normal menstrual cycle or inhibit ovulation, abnormal bleeding or dribbling may occur, it is recommended to do a good job of contraception in the future, should not be frequent use of emergency contraceptive pills. Before and after taking the emergency contraceptive pill 2 hours recommended fasting, should not eat greasy and stimulating, spicy food, and in the future to do a good job of reasonable contraceptive measures, should not be taken more than once.