Alcohol is not recommended for 2-6 hours after taking birth control pills. The main ingredient of birth control pills is estrogen, and it takes about 2-6 hours for the drug to be absorbed through the intestines after taking it. Alcohol in wine has the effect of activating blood circulation and removing blood stasis. Alcohol will join the blood circulation, accelerate the metabolism of contraceptive pills and affect the absorption of contraceptive pills, thus affecting the contraceptive effect. Moreover, contraceptive pills have a certain stimulation of the gastrointestinal tract, nausea and vomiting are easy to occur after taking contraceptive pills. Drinking alcohol after taking contraceptive pills will aggravate the stimulation of the gastrointestinal tract, which is easy to cause vomiting, thus affecting the effect of contraceptive pills. Emergency contraceptive pill belongs to hormone drugs, mainly used for no contraceptive measures after the emergency contraception, can not be used as a regular contraceptive method, the number of times a year to take contraceptive pills is not recommended more than 3 times.