Phosphodiesterase-5 inhibitors and benign prostatic hyperplasiaWang, ChunyuCurrent Opinion in Urology: January 2010 - Volume 20 - Issue 1 - p 49–54 doi: 10.1097/MOU.0b013e328333ac68 Benign prostatic hyperplasia: Edited by Steven A. Kaplan Buy Abstract Author InformationAuthors Article MetricsMetrics Purpose of review Benign prostatic hyperplasia (BPH) is prevalent in old men and often results in lower urinary tract symptoms (LUTS). Phosphodiesterase-5 (PDE5) inhibitors increase intracellular concentrations of cyclic guanosine monophosphate. PDE5 inhibitors (sildenafil, tadalafil, vardenafil, etc.) are first-line treatments for erectile dysfunction. Recently, PDE5 inhibitors have been found to regulate smooth muscle tone in human prostate. This article focuses on the use of PDE5 inhibitors for BPH/LUTS treatment and highlights the clinical significance. Recent findings Preclinical and clinical studies have provided promising evidence that PDE5 inhibitors may be an effective and well tolerated treatment option for BPH/LUTS. Combination therapy using PDE5 inhibitors and α1-adrenergic blockers resulted in greater improvements in BPH/LUTS than did either drug alone. Summary There has been increasing interest in the use of PDE5 inhibitors to treat BPH/LUTS. Combination of PDE5 inhibitors and α1-adrenergic blockers may have an additive beneficial effect on BPH/LUTS compared with monotherapy. Mechanisms of action of nitric oxide/cyclic guanosine monophosphate/PDE5 pathway in the treatment of BPH/LUTS deserve further investigations. Larger-scale, well designed clinical trials in future are needed to ascertain the safety, efficacy and cost-effectiveness of PDE5 inhibitors in the treatment of LUTS secondary to BPH. Baylor College of Medicine and The University of Texas MD Anderson Cancer Center, Houston, Texas, USA Correspondence to Dr Chunyu Wang, Baylor College of Medicine and The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA Tel: +1 713 839 1528; e-mail: firstname.lastname@example.org © 2010 Lippincott Williams & Wilkins, Inc.