Effectiveness and Body Weight
Studies suggest Plan B may be less effective for people with a body mass index (BMI) over 25 or weight above 165 pounds. Some data indicate reduced hormone levels in higher body fat, potentially lowering effectiveness. The manufacturer notes limited data in individuals with higher weight.
Alternative Options
For people with higher body weight, a copper intrauterine device (IUD) is the most effective emergency contraception. The ulipristal acetate pill (ella) may also maintain effectiveness across a wider weight range. People should consult a healthcare provider or visit a clinic for personalized advice.
