Is There a Weight Limit for Plan B?

Plan B does not have a weight limit that prevents people with a higher body mass index (BMI) from taking it. It is still safe to use in individuals with a higher body weight, and it will still substantially reduce the chance of pregnancy when a person uses it within 3 days of having unprotected sex.

Is there a weight limit for Plan B pill?

What's the short answer? Plan B may be less effective if you weigh 155 pounds or more, or have a BMI of 30 or higher. However, there are no safety concerns for using it if either applies to you.

Does Plan B work if weighed over?

In the U.S., there is no weight limit for Plan B. Health Canada, a regulatory agency, placed a warning on levonorgestrel products for their country, though. The labels warn of lower effectiveness in those who weigh more than 165 lbs and a lack of effectiveness in those who weigh more than 175 lbs.