Journal
RESEARCH AND REPORTS IN UROLOGY
Volume 15, Issue -, Pages 157-164Publisher
DOVE MEDICAL PRESS LTD
DOI: 10.2147/RRU.S411841
Keywords
selective beta 3-adrenoreceptor agonist; overactive bladder; residual urine volume; vibegron; mirabegron
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In this study, the treatment effects of vibegron on elderly Japanese patients with overactive bladder were evaluated. The results showed that vibegron significantly improved OABSS and OAB-q SF, especially in patients aged 80 and above. Furthermore, switching from mirabegron to vibegron also resulted in significant improvements to residual urine volume.
Objective: The treatment effects of vibegron have not previously been evaluated in a prospective, non-interventional observational study of elderly Japanese patients, particularly those =80 years old. In addition, no reports have referred to residual urine volume in switching cases. We therefore grouped patients by condition and investigated the treatment effects of vibegron on Overactive Bladder Symptom Score (OABSS), Overactive Bladder Questionnaire Short Form (OAB-q SF), and residual urine volume in each group.Methods: This multicenter, prospective, non-interventional, observational study consecutively enrolled OAB patients with total OABSS score =3 and OABSS question 3 score =2. Sixty-three patients from six centers were recruited. Vibegron 50 mg once daily was administered for 12 weeks as first-line monotherapy (first-line group), monotherapy switching from antimuscarinics or mirabegron due to failure of prior therapy (no washout period), or combination therapy with antimuscarinics (second-line group). OABSS, OAB-q SF, and residual urine volume were collected after 4 and 12 weeks. Adverse events were also recorded at each visit.Results: Of the 63 patients registered, 61 were eligible for analysis (first line, n=36; second line, n=25). The OABSS, excluding daytime frequency scores, and OAB-q SF scale showed significant improvement in all conditions. Switching from mirabegron to vibegron significantly reduced residual urine volume. No serious treatment-related adverse events were encountered.Conclusion: Vibegron 50 mg once daily significantly improved OABSS and OAB-q SF even in patients =80 years old. Notably, switching from mirabegron to vibegron resulted in significant improvements to residual urine volume.
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