can birth control pills stop you from getting pregnant
1 ) Also, the sooner you take emergency contraceptive pills, the better they work. 2  You can use pills labeled for emergency contraception or certain brands of daily birth control pills to prevent pregnancy after sex.( 3 Find out which ones here). ) Also, the sooner you take emergency contraceptive pills, the better they work. 2  You can use pills labeled for emergency contraception or certain brands of daily birth control pills to prevent pregnancy after sex.