5.2. Methods for Accrual and Randomization: Patients with an initial negative prostate biopsy that was performed at UHN and seen at the Prostate Center of the Princess Margaret Hospital will be considered for enrolment. Randomization by a random numbers table will be performed in blocks of 4 patients. After patients are deemed eligible for the study, the central office at Merck will be contacted and patient assignment given. The code will match the study drug label and the drug shipment will contain a blinded allocation envelope. The investigators, study participants and research coordinators will be blinded to the intervention.