Nitroglycerin Plus Radiotherapy Versus Conventional Radiotherapy in Patients With Lung Cancer.

Patients in the intervention group will receive four 8mg-patches (36 mg final dose) of transdermal nitroglycerin with 10 mg release in 24 hours, for 24 hours with 12-hour rest intervals (to avoid receptor saturation) during treatment with radiation therapy (30 Gy in 10 fractions, or 10 days of treatment).