No patients on placebo plus tamsulosin reported retention. Patients on solifenacin plus tamsulosin vs placebo plus tamsulosin showed larger reductions in frequency, but not of statistical significance. However, there were no statistically significant reductions in urgency. Patient-reported outcome measures showed no significant differences. The authors concluded that solifenacin plus tamsulosin was well-tolerated. There was a low incidence of AUR requiring PF 2341066 catheterization. At week 12 solifenacin plus tamsulosin decreased daily micturitions and urgency episodes. Further studies should include larger patient populations and longer
durations of therapy. Although antimuscarinics appear to be well-tolerated in men with BOO, data from men with varying degrees of BOO are needed. Recently Yamaguchi et al.25 assessed the efficacy and safety of solifenacin add-on therapy to tamsulosin Ivacaftor manufacturer in male LUTS patients with residual OAB symptoms despite tamsulosin monotherapy (ASSIST study). This was a randomized, multicenter, double-blind study. Patients aged more than 50 years with more than two urgency episodes per 24 h and more than eight micturitions per 24 h were randomized to three groups for 12-week treatment: tamsulosin (0.2 mg once daily) plus
placebo (TAM + PBO), tamsulosin plus solifenacin 2.5 mg daily, and tamsulosin plus solifenacin 5 mg daily (TAM + SOL). The primary endpoint was changes in the number of urgency episodes per 24 h, and micturitions, nocturia, UUI episodes, IPSS, and Overactive Bladder Symptom
Score RAS p21 protein activator 1 (OABSS) were compared. Safety was assessed on adverse events, PVR, and Qmax. Six hundred and thirty-eight men were randomized. Urgency was reduced by 2.2 and 2.4 episodes in the TAM + SOL 2.5 and 5 mg groups, respectively. The TAM + SOL 5 mg group showed significant improvement compared with TAM + PBO (−2.4 vs −1.9). The number of micturitions in both TAM + SOL groups was significantly reduced compared with TAM + PBO. IPSS storage symptom score and OABSS significantly improved in both TAM + SOL groups compared with TAM + PBO. Changes in IPSS voiding symptom score and Qmax were similar in all groups. Four patients (1.9%) in the TAM + SOL 5 mg group had urinary retention, but all recovered after catheterization. All of those patients had a prostate volume 30 mL or more, higher PSA level, and lower Qmax at baseline. TAM + SOL add-on therapy was presumed to have little effect on voiding symptoms and was well-tolerated. The authors concluded that tamsulosin and solifenacin combination therapy showed efficacy on urgency and was well-tolerated in male LUTS patients with residual OAB symptoms despite tamsulosin monotherapy. This ASSIST study was the first to use urgency as the primary endpoint of efficacy in male LUTS patients with residual OAB symptoms. A systematic review and meta-analysis of the role of anticholinergics in male LUTS was published in 2006.
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