Plan B, My Way, Take Action, and other levonorgestrel morning-after pills work best when you take them quickly after unprotected sex.
They’ll work best up to 3 days (72 hours) after unprotected sex.
You can take these up to 5 days (120 hours) after sex, but they don’t work nearly as well by day 5.
What happens if you take Plan B after 72 hours?
If you take it within 72 hours after you’ve had unprotected sex, levonorgestrel can reduce the risk of pregnancy by up to 89%. If you take Plan B One-Step within 24 hours, it is about 95% effective. That’s why it’s called Plan B.
Is Plan B effective after 4 days?
Even though emergency contraception is often called the “morning after pill” or “day after pill,” it may be effective for up to 5 days (120 hours) after unprotected sex. Studies show that progestin-only EC may be effective only through 4 or 5 days after sex.
How late can you take a Plan B?
Plan B One-Step is a single tablet you take by mouth. It must be taken as directed within 72 hours (3 days) after unprotected sex or birth control failure to help prevent pregnancy. The sooner you take it, the better it works.
Can I take Plan B after a week?
Taking the morning-after pill — emergency contraception — more than five days after unprotected vaginal intercourse won’t have any effect. Emergency contraception — the morning-after pill — is effective if started within 120 hours, or five days. The sooner emergency contraception is started, the better it works.