Trial Overview
PREVAIL is an international Phase 3, randomized, double-blind, placebo-controlled efficacy and safety study of oral MDV3100 in approximately 1,700 patients with progressive hormone-resistant prostate cancer, who have not been previously treated with chemotherapy and who are asymptomatic or mildly symptomatic.

Locations
Approximately 180 study sites located in North America, Europe, and Australia.
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Co-Primary Objectives
Determine the benefit of MDV3100 compared to placebo as assessed by:
- Overall survival
- Progression-free survival (PFS)
Select Secondary Objectives
Determine the benefit of MDV3100 compared to placebo as assessed by:
- Time to first skeletal-related event
- Time to initiation of cytotoxic chemotherapy
