Emergency contraception is a backup method for preventing pregnancy and is not for routine use. Plan B® can reduce your chance of pregnancy after unprotected sex. For example, if you were using a condom and it broke, if you forgot to take 2 or more of your birth control pills this month, or if you were sexually assaulted, Plan B® may be a good option for you. It is important to know that Plan B® is not RU-486 (the abortion pill). Because Plan B® is used to prevent pregnancy, it will not work if you are already pregnant, and it will not affect an existing pregnancy.
>>Learn more about emergency contraception.
Plan B® is safe and effective.
Plan B® is FDA approved — it contains the hormone levonorgestrel, the same ingredient found in many birth control pills. The difference is that Plan B® contains a larger dose of levonorgestrel than the amount found in a single birth control pill. And, unlike many birth control pills, Plan B® does not contain any estrogen.
>>Learn more about safety and efficacy.
Plan B® works better the sooner you take it.
Remember that you have only a few days to prevent a pregnancy after unprotected sex. If it is taken within 3 days (72 hours) after unprotected sex, it will decrease the chance that you will get pregnant by up to 89%. That means 7 out of every 8 women who would have gotten pregnant will not get pregnant. And Plan B® works even better if you take it within the first 24 hours after unprotected sex.1 Unprotected sex might happen when your healthcare professional’s office may be closed, such as over a weekend. Getting a prescription for Plan B® in advance means that it will be there for you — in time — if you ever need it.