Volume 8, Supplement 4Review ArticlesUpdate on the American Urological Association Guidelines for the Treatment of Benign Prostatic HyperplasiaAdvances in Alpha-Blocker Therapy in the Management of Urological DisordersSteven A KaplanThe updated 2003 American Urological Association (AUA) Guidelines for the treatment of benign prostatic hyperplasia (BPH) are the culmination of an exhaustive effort predicated on scientifically accepted methods of reviewing the medical literature. In this second publication of the guidelines, a multidisciplinary panel reviewed a new meta-analysis of outcome data from the BPH literature from before and after 1994. The major differences between the 2 guidelines are the changes in our understanding of the biology of the prostate and the introduction of new therapies. The vast majority of randomized controlled trials, particularly with respect to minimally invasive therapies and progression of BPH, were performed after the release of the 1994 guidelines. Also, the most recent AUA panel carefully reviewed unpublished data to make the guidelines as timely as possible. Studies that were subsequently published included those on the value of combination medical therapy for BPH. The panel agreed on updated recommendations for the treatment of moderate-to-severe lower urinary tract symptoms associated with BPH, and diagnostic algorithms were revised. The durability and utility of the present guidelines should exceed that of its predecessor. [Rev Urol. 2006;8(suppl 4):S10-S17]Benign prostatic hyperplasiaLower urinary tract symptomsCombination therapy5-reductase inhibitorsAUA GuidelinesAUA Symptom Scores