Some may not contain enough contraceptive to be effective
                                
                                
                                    (Newser) -
                                    Pfizer is yanking about a million packs of birth control pills off of shelves nationwide over concerns that they don't contain enough contraceptive to be effective, reports  Reuters . The recall, announced yesterday, affects lots of Lo/Ovral-28, Norgestrel, and Ethinyl Estradiol; due a packaging error, some packets contain too many...