In principle, it is forbidden to drink alcohol when taking contraceptives, so as not to reduce the effect of contraceptives. After drinking alcohol, you can take contraceptives orally after the alcohol has been excreted for 4-6 hours, so as to reduce the occurrence of adverse reactions. At the same time, when taking the pill orally, try to choose to take it on an empty stomach, or 2 hours after a meal, so as not to affect the effect of the pill. The pill is not 100% contraceptive, there is a 10-20% chance of failure, you can buy early pregnancy test about 12 days after intercourse to rule out pregnancy. When taking the pill, take as much vitamin C orally as possible to reduce adverse reactions.