A new report finds a version of the morning-after pill may not work for women who weigh over 160 pounds.
Researchers found the French drug, 'Norlevo' starts to lose effectiveness in women who weigh more than 165 pounds.
But, for women who weigh more than 176 pounds, the morning after pill doesn't work at all!
'Norlevo' is identical to the morning-after pill "Plan B One-Step" that's made here in the United States.
At this point, there is no comment from the manufactures of Plan B.
Food and Drug Administration reps say they are reviewing this information and will determine if any labeling changes in the U.S. are needed.