If a cisgender man or person assigned male at birth takes hormonal birth control (like the pill) once or twice, nothing will happen. However, if a man takes an emergency contraceptive like Plan B, the effects would be ineffective in preventing pregnancy. Plan B contains high levels of a hormone called levonorgestrel, which is effective in delaying ovulation and ultimately preventing pregnancy shortly after unprotected sex, if the condom broke last night, or if the guy didnt pull out in time. If a man accidentally ingests Plan B, the possible side effects include nausea, abdominal cramping, fatigue, and minor changes to the menstrual cycle. However, these side effects primarily occur in people with ovaries, eggs, and menstrual cycles. According to a man who accidentally mistook a friends Plan B for Ambien and swallowed it, most of the effects were psychological, aside from a stomach ache and orange-tinted urine. The Poison Control operator ensured him that was probably going to be the worst of it, however, he shouldnt try taking it again.