Is there a fixed number of times you can take Plan B? (i.e., “You can only take it three times in your life.”) There is no fixed [number of] times that you can take Plan B, but the manufacturer is quick to point out that, “Plan B should NOT be used as your primary form of contraception.” But there is NO evidence that repeatedly using Plan B is harmful to your health!
Can you take Plan B while on another form of birth control? Yes. We have occasionally provided Plan B to women who are already on the birth control pill if they have been irregular in taking the pills, missed a day or just want the additional reassurance that a pregnancy will be avoided.
Does Plan B only literally work “the morning after”? How long is the window to take it? The package insert for Plan B recommends that you take the medication within 72 hours for maximum protection. There have been studies that report effectiveness even up to five days, but they stress the importance of taking it AS SOON AS POSSIBLE to get the most benefit. An interesting fact that some people may not know … It will not abort or affect a pregnancy if [a pregnancy] has already occurred.