A Chemoprevention Study of an Investigational Drug in Men With High Grade Prostate Intraepithelial Neoplasia (PIN)

High grade PIN is the development of precancerous, abnormal tissue of the prostate gland that puts men at high risk of developing prostate cancer. This study will take one year of participation with clinic visits every three months. There will be two prostate biopsies during the study, at six and twelve months. If qualified to participate, you will be randomly assigned to one of four treatment groups. Three out of four groups are varying doses of the study medication and the other is the placebo group (like a sugar pill).