Abstract
Effect of tadalafil on lower urinary tract symptoms (LUTS), erectile function and quality of life (QoL) were prospectively evaluated in patients with benign prostatic hyperplasia (BPH) at multicenter. Eligible men were ≥40 years who had no treatment with alpha-blocker for BPH, with total International Prostate Symptom Score (IPSS) ≥8, IPSS-QOL ≥2 and prostate volume ≥20 mL. Data were collected on age, body mass index (BMI), and prostate specific antigen (PSA). Patients were asked to complete a self-reported questionnaire regarding the IPSS, Overactive Bladder Symptom Score (OABSS), International Index of Erectile Function 5 (IIEF5), and Medical Outcome Study 8-Item Short-Form Health Survey (SF-8). These measures were assessed at baseline, 4-, 8-, 12-week of tadalafil treatment. In addition, uroflowmetry was also performed at baseline, and 12-week end point visit. Thirty five patients with mean age 67.3 years, mean BMI 23.6 kg/m2 , mean prostate volume 36 mL, and mean PSA 3.4 ng/mL were enrolled. Treatment with tadalafil significantly improved IPSS total score, IPSS voiding subscore, IPSS storage subscore, OABSS and IPSS-QoL score after 4 weeks and these improvements were maintained for 12-week treatment period. IIEF5 score and general health in SF-8 are significantly improved with the treatment of tadalafil. However, maximum flow rate and postvoiding residual volume were not significantly changed. There were not any serious adverse events. These results indicate that tadalafil 5 mg once daily would be effective and well tolerated treatment in Japanese men with BPH-LUTS.
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