- Plan B must be taken within 72 hours (3 days) after unprotected sex or birth control failure. The sooner it is taken the better it works.
- You can find Plan B yourself in the Family Planning aisle at all major retail stores. There is no prescription or ID required to purchase Plan B in any U.S. state, and there is no age restriction.
- Plan B temporarily delays ovulation or the release of an egg from the ovary. Plan B One-Step won't work if you are already pregnant and wont impact an existing pregnancy.
- It should not be used as regular birth control.
Plan B is a progestin?only emergency contraception product that helps prevent pregnancy when taken within 72 hours of unprotected sex. The sooner you take it, the better it works. Plan B is a backup method of preventing pregnancy and should not be used as regular birth control. Use as directed.