Tadalafil in the management of lower urinary tract symptoms: a review of the literature and current practices in Russia
Abstract
INTRODUCTION: Strong epidemiologic evidence supports correlation between lower urinary tract symptoms due to benign prostatic hyperplasia (LUTS/BPH) and erectile dysfunction (ED). The link has biologic plausibility given phosphodiesterase type 5 (PDE5) expression in pelvic structures. PDE5 inhibitors target pathophysiologic processes implicated in LUTS/BPH.
MATERIAL AND METHODS: This review highlights the efficacy and safety of the daily use of a PDE5 inhibitor tadalafil in LUTS/BPH, with a focus on LUTS/BPH medical management in Russia.
RESULTS: Alpha-blockers and phytotherapy are major components of the current LUTS/BPH therapy in Russia. Russian regulatory authorities granted approval for once-daily tadalafil for treatment of LUTS/BPH in January 2012. In a pivotal study, tadalafil 5 mg once-daily significantly improved International Prostate Symptom Score (IPSS) over 12 weeks vs. placebo (P = .004) regardless of baseline ED severity. IPSS improvement was maintained at 12 weeks. Integrated analysis of randomized studies showed that tadalafil 5 mg once-daily resulted in significant symptom improvements across a range of men with LUTS/BPH. Relief of LUTS due to tadalafil was independent of improvement in ED; improvements in IPSS and erectile function were only weakly correlated (r = -0.229). Another pooled analysis found similar improvement in LUTS/BPH between men with or without ED, with non-significant P values for treatment-by-ED-status interactions for total IPSS ( P =…
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