This study is designed to assess the effects of adding nitroglycerin (NTG) patches, delivery 25 mg NTG per 24 h, to the standard first line treatment of metastatic non-squamous non-small cell lung cancer (NSCLC), i.e. 4 cycles of carboplatin-paclitaxel-bevacizumab, followed by bevacizumab alone until disease progression. Tumor hypoxia is a common phenomenon in lung cancer; it is a known poor prognostic marker, related to treatment resistance. Pre-clinical studies have shown that nitric oxide (NO) donating drugs may decrease hypoxia related drug resistance. NTG is a NO donating drug. NTG increases tumor blood flow and thereby augments antitumor drug delivery to the tumor.