Efficacy Study Comparing ZD6474 in Combination With Pemetrexed and Pemetrexed Alone in 2nd Line NSCLC Patients

Non-small cell lung cancer (NSCLC) can be treated with drugs that kill tumour cells, stop them from dividing, or stop the growth of the blood supply that cancers need to grow and spread. Clinical research has shown that drugs that inhibit vascular endothelial growth factor receptor (VEGFR) or epidermal growth factor receptor (EGFR) signalling can increase overall survival in patients with advanced non-small cell lung cancer (NSCLC). Preclinical studies have shown that vandetanib (ZD6474) is an inhibitor of both VEGFR and EGFR signalling. Giving vandetanib may therefore inhibit the growth of cancer cells by blocking their blood supply and by stopping them from dividing. This lung cancer study is to investigate if adding vandetanib to Alimta (pemetrexed) is more effective than Alimta (pemetrexed) alone.