NCT00006349 2016-07-13Donepezil and Vitamin E to Prevent Side Effects Caused By Radiation Therapy to the Head in Patients Receiving Treatment for Small Cell Lung CancerAlliance for Clinical Trials in OncologyPhase 3 Completed9 enrolled
NCT00003599 2012-02-22Vitamin E in Preventing the Side Effects of Isotretinoin in Former and Current Smokers Who Are Receiving Isotretinoin to Prevent Lung CancerM.D. Anderson Cancer CenterPhase 3 Withdrawn