Pill and alcohol are two things that are basically compatible. Alcohol - no matter in which quantities - does not affect the contraceptive effect of the pill. Drinking alcohol in an amount that you can not tolerate can lead to a "hangover" with the well-known reactions: nausea, vomiting, and diarrhea. This can affect the prevention. Read more about the relationship between pill and alcohol.
Pill & Alcohol: What Prevents Contraception
If you take the pill regularly, preferably always at the same time of day, then the safety of contraception is also guaranteed, because the effectiveness of the pill is relatively closely related to the regular time of taking. Most medications, as well as the consumption of alcohol, generally have no effect on the contraceptive effect of the pill.
But sometimes the interaction between pill and alcohol can have a negative impact on contraception - if you drink too much and can not tolerate it. The body reacts to alcohol poisoning with a natural defense reaction: vomiting and / or diarrhea. In this way, most of the poison taken - the alcohol - should be removed from the body before it can have a harmful effect on organs.
Pill and alcohol in the evening
If you take the pill regularly in the evening and get vomiting or diarrhea that night due to drinking alcohol, it may cause the pill's hormones to be removed from the body before they are (completely) absorbed by the body. The contraceptive effect is then no longer guaranteed.
Pill and alcohol - the morning after
Even if you always take the pill in the morning, drinking alcohol the night before can still be a problem. Morning sickness with vomiting and maybe diarrhea then brings the pill drug out of your body.
The pill can only be as safe as the application
The pill is one of the safest contraceptive methods with a Pearl index of 0.1 to 0.9 (depending on the composition). The Pearl Index states how many of the 100 women who use the same contraceptive method for one year become pregnant after this year. The lower the index, the safer the contraceptive method. However, this security can only be given if the conditions are right. In addition to the regular intake, this also means that the effect is not nullified by the simultaneous intake of pill and alcohol with subsequent vomiting or diarrhea.