How long do you have to take Plan B?

The sooner you take it, the better it works

Plan B helps prevent pregnancy before it starts by temporarily delaying ovulation when taken within 72 hours (3 days) after unprotected sex. Wondering whether you’re within the window to take Plan B?

What you need to know about Plan B

• Emergency contraception that works by temporarily delaying ovulation
• Won’t interfere with your regular birth control, or make it any less effective
• Won’t impact your ability to get pregnant in the future