The Justice Department says the judge 's ruling does not have `` point-of-sale restrictions '' Key ingredient in Plan B is the synthetic hormone levonorgestrel . A federal appeals court on Monday threw out a lawsuit that sought to block the Food and Drug Administration from requiring pharmacies nationwide to sell emergency contraceptives without prescriptions.
The Justice Department says the judge 's ruling does not have `` point-of-sale restrictions '' Key ingredient in Plan B is the synthetic hormone levonorgestrel . It prevents fertilization or , if an egg has been fertilized , prevents it from embedding in the uterus .