The Morning After Pill, or the Plan B, is a progesterone pill that you take once, o, depending on the formulation, you take it twice, once every 12 hours. And what that does is it prevents pregnancy only if you've had an accident, meaning that you've had a contraceptive failure. This is not an effective form of birth control. In other words, this is a helpful way to prevent undesired pregnancy only if you've had a birth control failure. If you are not using birth control, then you should be seeing a nurse practitioner or a physician to get yourself an effective form of birth control that you are interested in using or use condoms.
Within the first 12 hours of your birth control failure, you should be using this product. It is excellent at preventing pregnancy if you use it before 12 hours. However, it is still effective if you use it up to 72 hours from the last act of unprotected sex.
If you are a strict condom user, before you have a condom accident, I highly recommend that you get Plan B, and you keep it in your medicine cabinet. Just in case you have an accident, within that 12 hours, you can use those pills, if you have them available.
Let's say you're going skiing with your boyfriend, and you're in a place where you may not have access to a pharmacy right away. You should go to your pharmacist, ask them for the Plan B, and pack it in your toiletries with your toothpaste and your hairbrush and all the other things that you find are so important. You should put this on your list of things that you need to keep with you when you're traveling.
Again, the Plan B is a pill that you use only if you've had an accident where you've had a contraceptive failure. This is not an effective form of birth control. If you need birth control, you should be using condoms, or you can follow up with a nurse practitioner or a physician to get the best birth control option for you.