OUTLINE: This is a two stage study. The first stage is a randomized study, and the second stage is a dose escalation study. In the first stage of the study, patients receive either intravenous gemcitabine/amifostine/cisplation (GAP) or gemcitabine/cisplatin (GP) in the first cycle. Patients are administered the other arm in the second cycle. In the second stage of the study (dose escalation), the initial dose of GP or GAP is given on days 1 and 8 every 28 days. Dose escalation is carried out in cohorts of 3 patients per dose level. If 1 of 3 patients experiences dose limiting toxicity (DLT), then 3 more patients are accrued at the same dose level. The maximum tolerated dose (MTD) is defined as the lowest dose at which 2 of 6 or 2 of 3 patients experience DLT. Patients experiencing grade 3 or 4 toxicity or tumor progression are removed from the study. Patients will be reassessed every 12 weeks.