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  • Title: Silodosin for men with chronic prostatitis/chronic pelvic pain syndrome: results of a phase II multicenter, double-blind, placebo controlled study.
    Author: Nickel JC, O'Leary MP, Lepor H, Caramelli KE, Thomas H, Hill LA, Hoel GE.
    Journal: J Urol; 2011 Jul; 186(1):125-31. PubMed ID: 21571345.
    Abstract:
    PURPOSE: We evaluated the efficacy and safety of 2 doses of silodosin vs placebo in men with moderate to severe abacterial chronic prostatitis/chronic pelvic pain syndrome who had not been treated previously with α-blockers for chronic prostatitis/chronic pelvic pain syndrome. MATERIALS AND METHODS: In this multicenter, randomized, double-blind, phase II study, men 18 years old or older with chronic prostatitis/chronic pelvic pain syndrome, a total National Institutes of Health Chronic Prostatitis Symptom Index score of 15 or greater and a National Institutes of Health Chronic Prostatitis Symptom Index pain score of 8 or greater received 4 or 8 mg silodosin, or placebo once daily for 12 weeks. The primary efficacy end point was change from baseline to week 12 in National Institutes of Health Chronic Prostatitis Symptom Index total score. RESULTS: Of 151 patients (mean age 48 years) 52 received 4 mg silodosin, 45 received 8 mg silodosin and 54 received placebo. Silodosin 4 mg was associated with a significant decrease in total National Institutes of Health Chronic Prostatitis Symptom Index score (mean ± SD change -12.1 ± 9.3) vs placebo (-8.5 ± 7.2, p = 0.0224), including a decrease in urinary symptom (-2.2 ± 2.7, placebo -1.3 ± 3.0, p = 0.0102) and quality of life (-4.1 ± 3.1, placebo -2.7 ± 2.5, p = 0.0099) subscores. The 4 mg dose of silodosin also significantly increased Medical Outcomes Study Short Form 12 physical component scores (4.2 ± 8.1, placebo 1.7 ± 9.0, p = 0.0492). During global response assessment 56% of patients receiving 4 mg silodosin vs 29% receiving placebo reported moderate or marked improvement (p = 0.0069). Increasing the dose of silodosin to 8 mg resulted in no incremental treatment effects. CONCLUSIONS: Silodosin 4 mg relieved symptoms and improved quality of life in men with chronic prostatitis/chronic pelvic pain syndrome but its efficacy requires confirmation in additional studies.
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