Phase I trial of vinzolidine.

Vinzolidine is a new, orally active, semisynthetic vinca alkaloid which shows broad anti-tumor activity against murine tumor test systems. This phase I study established a 1 day every 2 week schedule of 35 mg/m2 in good-risk patients and of 30 mg/m2 in poor-risk patients. Maximal tolerated dose was 45 mg/m2 with severe neutropenia, syndrome of inappropriate antidiuretic hormone, and paralytic ileus. Significant antitumor responses were seen in two patients with lymphoma and in one with squamous cell cancer of the lung.