Between 10% and 25% of newly diagnosed stage IIIB/stage IV patients currently receive single agent chemotherapy regimens. A significant proportion of these patients will be elderly (70 years of age) and many oncologists would consider intravenous vinorelbine or gemcitabine to be the standard of care in this patient population. It has been demonstrated that single agent vinorelbine offers therapeutic advantages to selected NSCLC patients over best supportive care alone.