Overview This Study is to Compare the Efficacy of ZD6474 and ZD1839 in Subjects With NSCLC. Status: Completed Trial end date: 2007-06-01 Target enrollment: Participant gender: Summary The purpose of this study is to compare the efficacy of ZD6474 and ZD1839 in patients with NSCLC after Failure of Prior Platinum-based Chemotherapy. Phase: Phase 2 Details Lead Sponsor: Genzyme, a Sanofi CompanyTreatments: Gefitinib