The progestin-only emergency contraceptive pills (Plan B One Step, Next Choice) reduce your risk of pregnancy by up to 95% if taken in the first 24 hours or by 88% when taken in the first 72 hours (3...
The effectiveness of the pill depends on how soon after having unprotected intercourse that she takes the MAP.
Research finds it to be 95% effective if taken within the first 24 hours.
In the US, men and women can buy it without a prescription if you're 17 or over, and with a prescription if 16 or younger and female. Men 16 and under can't buy it. It can be purchased at most large...