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Medivation and Astellas Provide Update on PREVAIL

Mon, 04/01/2013 - 8:00am

Medivation, Inc. and Astellas Pharma Inc. today announced that the companies have established an updated interim analysis plan for the PREVAIL trial, a global Phase 3 clinical trial evaluating XTANDI® (enzalutamide) capsules in men with metastatic castration-resistant prostate cancer (mCRPC) who have not yet received chemotherapy. The planned interim analysis for the PREVAIL trial is expected to occur in 2013. In addition, the protocol-specified number of radiographic progression-free survival (PFS) events has been exceeded, and the primary PFS analysis will occur at the time of the interim analysis for overall survival. Medivation is conducting this study under its agreement with Astellas.

"As we did with our AFFIRM trial, we have evaluated recent industry data announced in the prostate cancer disease area and updated our analysis plan for the PREVAIL trial," said Lynn Seely, M.D., chief medical officer of Medivation, Inc. "We've shared our updated plan with the U.S. Food and Drug Administration who are in agreement with our approach. We plan to conduct the PREVAIL interim analysis in 2013."

The randomized, double-blind, placebo-controlled, multi-national Phase 3 PREVAIL trial met its enrollment goals in May 2012 at sites in the United States, Canada, Europe, Australia, Russia, Israel and Asian countries including Japan. The PREVAIL trial includes 1,717 patients who have progressed following treatment with a luteinizing hormone releasing hormone (LHRH) analog drug only, as well as patients who have progressed following treatment with both an LHRH analog drug and an anti-androgen drug. The study co-primary endpoints are radiographic progression-free survival and overall survival; secondary endpoints include time to first skeletal-related event and time to initiation of chemotherapy. The trial is designed to evaluate enzalutamide at a dose of 160 mg taken orally once daily plus standard of care versus placebo plus standard of care.

 

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