Bipolar Androgen Therapy to Restore Sensitivity to Androgen Deprivation Therapy for Patients With Metastatic Castration Resistant Prostate Cancer

PRIMARY OBJECTIVE: I. To determine the influence of bipolar androgen therapy (BAT) on androgen receptor (AR) activity in patients with metastatic castration-resistant prostate cancer (mCRPC). SECONDARY OBJECTIVES: * To determine the clinical efficacy and safety of BAT in patients with mCRPC. * To determine the change in fatigue and quality of life in patients receiving BAT. OUTLINE: Patients receive testosterone intramuscularly (IM) on day 1 of each cycle. Cycles repeat every 28 days for 3 cycles in the absence of disease progression or unacceptable toxicity. Patients also continue to receive standard of care leuprolide acetate subcutaneously (SC) per their standard schedule. Patients undergo computed tomography (CT) scan, bone scan and may undergo magnetic resonance imaging and tumor biopsy throughout the study. After completion of study treatment, patients follow up at 30 days and every 3 months for up to 2 years.