Abstract
Background: The effect of combining an α1-adrenergic receptor blocker (α1-blocker) and the β3-adrenoceptor agonist vibegron for treating persistent overactive bladder (OAB) symptoms associated with benign prostatic hyperplasia (BPH) on sexual function remains uncertain. Therefore, we aimed to evaluate the effects of vibegron as an add-on to α1-blocker therapy on both OAB and sexual function. Methods: Forty-three patients with BPH in whom OAB symptoms were inadequately controlled by α1-blocker treatment were included in this prospective open-label study. The OAB Symptom Score (OABSS), International Prostate Symptom Score (IPSS), 15-item International Index of Erectile Function (IIEF-15), and Erection Hardness Score (EHS), as well as the residual urine volume and serum-free testosterone (FT) and C-reactive protein (CRP) levels, were evaluated before and 8 weeks after the daily administration of 50 mg vibegron/α1-blocker combination therapy. Results: Vibegron/α1-blocker combination therapy significantly improved the OABSS (from 6.9 ± 2.6 to 5.1 ± 2.9, p < 0.0001) and IIEF intercourse satisfaction domain (from 1.1 ± 2.3 to 1.9 ± 2.6, p = 0.02). No significant differences were observed for the IPSS, EHS, total IIEF-15 score, residual urine volume, and serum FT and CRP levels. Conclusions: The study findings suggest that vibegron/α1-blocker combination therapy improves OAB and sexual satisfaction.
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