How effective is Plan B?

The morning-after pill Plan B is most effective (>97%) when taken within 24 hours of unprotected sex and 75%-89% effective if you take it within three days.
Taking Plan B at the appropriate time after unprotected intercourse can help prevent unwanted pregnancies.

How Effective is Plan B? Experts Discuss - GoodRx

The Effectiveness of Plan B Emergency Contraception Over Time

Morning After® Pill, Compare to Plan B, Emergency Contraceptive Levonorgestrel 1.5mg, 1 Tablet, Safe & Effective for Women of All Ages

How Does Plan B Work?

Plan B: Effectiveness, How It Works, Side Effects, and More

How Effective is Plan B? Experts Discuss - GoodRx

B Kit - Office of Health Advancement

Option 2, Compare to Plan B, Emergency Contraceptive

Morning-After Pill, Emergency Contraception

Plan B: How Many Times Can You Take It?