Real-World Safety and Effectiveness of Tadalafil in Patients with Lower Urinary Tract Symptoms Secondary to Benign Prostatic Hyperplasia: A Japanese Post-Marketing Surveillance Study
Abstract
Objective To evaluate the long-term safety and effectiveness of tadalafil in Japanese men with lower urinary tract symptoms secondary to benign prostatic hyperplasia in real-world clinical practice; and to investigate the safety profile in patients aged ≥75 years. Patients and Methods This was a prospective, non-interventional, multicenter, post-marketing surveillance study in which Japanese patients with lower urinary tract symptoms secondary to benign prostatic hyperplasia were observed for up to 18 months after initiating tadalafil treatment. The real-world safety and effectiveness outcomes were assessed at baseline and at 1, 3, 6, 12, and 18 months post-treatment or the last day of treatment. Results Most patients received tadalafil 5 mg per day throughout the observation period. Among 1393 patients analyzed for safety, the overall incidence of adverse drug reactions was 8.3%. These adverse drug reactions were generally consistent with the known safety profile of tadalafil and no new safety risks were identified in long-term use. There was no statistical difference in the frequency of adverse drug reactions between patients aged <75 and ≥75 years. The mean change in total International Prostate Symptom Score (IPSS) and IPSS- quality of life subscore was significantly improved at each timepoint. At 18 months, IPSS had improved by 5.0 points (P < 0.001) and IPSS- quality of life subscore had improved by 1.5 points (P < 0.001). The mean change in post-voiding residual urine…
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