September 16, 2011 (Washington D.C.) – If you have taken any of the following brands of birth control pills manufactured by Qualitest Pharamaceuticals, you are advised to switch to another, non-hormonal form of birth control immediately and talk to your doctor or pharmacist: Cyclafem, Emoquette, Gildess, Osrythia, Previfem, and Tri-Previfem.