- Phase I: Patients receive gemcitabine hydrochloride IV over 30 minutes and paclitaxel IV over 3 hours on day 1, cisplatin IV over 4 hours on days 1-5, and ifosfamide IV over 1 hour on days 2-6. Patients also receive filgrastim or lenograstim (G-CSF) subcutaneously (SC) on days 7-18 or until blood counts recover OR pegfilgrastim SC once on day 6. Treatment repeats every 3 weeks for up to 4 courses in the absence of disease progression or unacceptable toxicity.