The Plan B® One-Step Advantage

The sooner you take emergency contraception, the better it works. Plan B® One-Step is the only emergency contraception that's just one pill, so you get what you need right away. Other emergency contraception requires two pills, twelve hours apart.

And Plan B® One-Step can reduce the chance of pregnancy when taken as directed up to 72 hours (3 days) after unprotected sex (if your regular birth control method fails, or if you've had sex without birth control).