Levonorgestrel Emergency Contraception

Levonorgestrel (Plan B® or generic equivalent), is a progestin-only emergency contraceptive pill used to prevent pregnancy after sex. The tablet (pill) should be taken as soon as possible, preferably within 24 hours of last sexual contact. It can work up to 5 days (120 hours) after sex, but is less effective with time.

• Levonorestrel Emergency Contraception handout - updated July 2019