How Plan B® works
When did you have sex
without a contraceptive or have a contraceptive accident?
It’s called the morning-after pill for a reason
Unlike regular birth control methods, which are used before or during sex, Plan B® is used to prevent pregnancy after unprotected sex or following a contraceptive accident.
Plan B® comes in a one-pill dose (levonorgestrel 1.5 mg). If taken within 72 hours (three days) and preferably within 12 hours of a contraceptive accident or unprotected sex, Plan B® can prevent pregnancy.
Each Plan B® tablet contains 1.5 mg of levonorgestrel—an ingredient that is also commonly found in birth control pills.
When taken correctly (within 72 hours of a contraceptive accident or unprotected sex), Plan B® works by:
- Temporarily stopping the release of an egg from the ovary (ovulation)
- Preventing fertilization
- Preventing a fertilized egg from attaching to the uterus by changing the uterine lining
Plan B® is not an abortion pill—if you take Plan B®, you will not be terminating a pregnancy.
*IQVIA/IMS Health, CDH, 2019 sales in units.
†Except in Québec (where you will need to speak to the pharmacist).