As lithium has been shown in an in vitro model to suppress cellular proliferation, and suppress tumor growth in an in vivo xenograft model, we propose to determine its effect on prostate cancer cells in human patients undergoing radical prostatectomy. In this pilot study we plan to assess the toxicity of lithium administration in patients prior to radical prostatectomy. This will include any clinical toxicity as well as any increase in intra-, peri- or postoperative complications.