Prostate cancer patients that have chosen to undergo a prostatectomy as their primary treatment option will be recruited to this trial. Forty-four subjects will be randomized to either placebo or simvastatin (40 mg po/day) for 4 weeks prior to surgery. Serum samples will be obtained at baseline and immediately prior to prostatectomy. At prostatectomy, cancerous and benign prostate tissue will be microdissected and cryopreserved. Archival prostatectomy tissues will be used to construct tissue microarrays containing matched benign and malignant sections. The effect of HMG-CoA reductase inhibition on lipid raft cholesterol content and targets of prenylation will be determined. The incidence of apoptosis will be determined along with protein levels of mediators of apoptosis. Lastly the effect of statin therapy on cellular markers of proliferation will be determined.