Reuters: Question on whether emergency contraceptives less effective in women weighing more than 165 lbs.

NEW YORK — The Food and Drug Administration is reviewing emergency contraceptives like Plan B One-Step on whether they are less effective in women weighing more than 165 lbs., according to a report published Monday by Reuters

FDA's impetus was the fact that European health regulators recently required a label change communicating that a similar emergency contraceptive began losing effectiveness in women who weighed 165 lbs. The emergency contraceptive did not work for women weighing more than 176 lbs, Reuters reported. 

The emergency contraceptive that came under question in Europe is HRA Pharma's Norlevo. 




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