This study is designed to determine the safety and tolerability of Entinostat with Enzalutamide for treatment of patients with castration-resistant prostate cancer. There will be two dose levels of Entinostat in combination with same dose of Enzalutamide. Patients will be followed during treatment and 1 month post discontinuation.
To determine the safety and tolerability of Entinostat in combination with Enzalutamide in metastatic castrate resistant prostate cancer