Millions of American women may find traditional morning-after medication ineffective, according to an expert’s warning, per the NY Post.

Doctor Charis Chambers, known as The Period Doctor online, has addressed the question about weight causing the morning-after pill to lose its effectiveness. 

In a TikTok video, Chambers revealed that levonorgestrel morning-after pills, commonly known as Plan B, have shown decreased efficacy based on both the weight and BMI of the user.

Research says that individuals who are overweight or obese are more likely to experience failure with the medication.

Those with a BMI of 25 to 29.9 were twice as likely to experience failure. A BMI of 30 or higher had four times the likelihood of failure.

Weight May Be The Cause Of Ineffective Morning After Pill

Experts caution that the medication may be less effective for individuals weighing 154 pounds or more and may not work at all for those weighing over 176 pounds.

The most effective emergency contraception options for women with a BMI over 30 or weighing over 176 pounds, are the copper IUD or the oral medication ulipristal acetate, Dr. Chambers advises.

The morning-after pill’s effectiveness can be affected by factors like weight, timing of intake, and other medications. It should be taken as soon as possible after unprotected sex and is most effective within the first three days.

Combining the pill with certain medications is not recommended.

#Clique, what are your thoughts?