Heads up! If you take an emergency contraception pill with levonorgestrel (like Plan B, Take Action, and others) and you weigh more than 165 pounds, it may not work as effectively and could lead to pregnancy. The emergency contraception pill ella is another option, but if you weigh over 195 pounds, it may not work as effectively.

No matter your weight, getting certain IUDs as emergency contraception works within 120 hours (5 days) after having unprotected sex. This is the most effective type of emergency contraception. An IUD must be inserted by a health care provider.

Source: Planned Parenthood