Does Plan B protect from pregnancy like regular birth control pills?
Not all of the time it doesn’t, no. Plan B reduces the average risk of pregnancy among users from about 8 percent to about 1 percent. In other words, when used correctly, it reduces the risk of pregnancy by 89 percent after a single act of unprotected sex. Effectiveness declines as the interval between intercourse and the start of treatment increases. In the first 24 hours after intercourse, Plan B can prevent 95 percent of expected pregnancies. Treatment, therefore, should not be delayed. Plan B can be provided as frequently as needed. However, Plan B is not recommended for routine use as a contraceptive among sexually active women. The failure rate of Plan B is calculated for a single use. If Plan B is used on more than one occasion, the cumulative failure rate will be higher. In other words, yes, you can use it more than once in a month if you think you must- but it’s more likely to fail to work properly if you do. It is not meant to be a substitute for other forms of birth control.
