Isotretinoin is a form of vitamin A. It reduces the amount of oil released by oil glands in your skin, and helps your skin renew itself more quickly. Isotretinoin is used to treat severe nodular acne that has not responded to other treatments, including antibiotics. Isotretinoin is available only from a certified pharmacy under a special program called iPLEDGE. You must be registered in the program and understand the risks and benefits of taking this...