Efficacy and Safety of Vibegron Add-on Therapy in Men with Persistent Storage Symptoms after Receiving Alpha 1-Blocker or Phosphodiesterase 5 Inhibitor: A Preliminary Study
Abstract
OBJECTIVES
To investigate the efficacy and safety of vibegron add-on therapy in men with persistent storage symptoms receiving α-1 blockers or PDE5 inhibitor for benign prostatic hyperplasia and then determine the independent factors affecting the efficacy of vibegron.
METHODS
Vibegron 50 mg was administered for 12 weeks to 42 patients (72.0 ± 8.2 years) with persistent storage symptoms who had taken α-1 blockers (22 patients) or PDE5 inhibitor (20 patients). The primary endpoint was change in the Overactive Bladder Symptom Score from baseline to end of treatment. The secondary endpoints were changes in each question of several questionnaires, maximum flow rate and residual urine volume. Finally, independent factors affecting the efficacy of vibegron were investigated.
RESULTS
Total Overactive Bladder Symptom Score was significantly decreased (6.21 ± 3.12 vs 4.38 ± 2.46; P<0.001). Although each score of several questionnaires, especially for storage symptoms, improved significantly, no significant improvement was found in stress incontinence, straining, bladder pain and urethral pain in the Core Lower Urinary Tract Symptom score. Maximum flow rate and residual urine volume did not change, and no patient discontinued vibegron because of adverse events. Multiple regression analysis showed that Overactive Bladder Symptom Score, Core Lower Urinary Tract Symptom score, prostate volume and monotherapy with α-1 blocker were independent factors affecting the efficacy of vibegron.…
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