Known as the 'morning after' pill, the contraceptive is now available over the counter for women 18 and older. It's got the same ingredient found in birth control pills, but in a different dose. And don't expect to see Plan B sold next to the condoms at the local convenience store. In order to ensure that girls 17 and under won't have non-prescription access to Plan B, it will only be dispensed over-the-counter at retailers with pharmacy services and a pharmacist who will check IDs for proof of age.