###Human: Is it necessary to take another birth control pill if vomited after five hours of the first one? ###Assistant: Hello. I have read your concern. If you have been on a pill for more than a month and this is your second pack, you have nothing to worry if you just missed out one pill. Since most probably you have vomited out the pill, you can take another pill for today and then continue as once a day every day. You do not have to take a double pill. You will continue to be protected and just continue with the pack. The problem will only arise if you have not been consistently taking it, if you just missed it today because of the vomiting, it will not be too significant. For the vomiting, hydrate yourself and better to take Vitamin B and Advil for your hangover. Hangover. Gastroenteritis. Gastroenteritis secondary to alcohol intake. Hydration, continue with the pill.