Effect of tadalafil add-on therapy in patients with persistant storage symptoms refractory to α

The aim of this study was to investigate the efficacy and safety of tadalafil add-on therapy with α Patients with persistent storage symptoms refractory to α Of the 75 patients recruited to the study, 38 and 37 were assigned to the tadalafil and solifenacin groups, respectively. There were no significant difference in baseline characteristics between the two groups. The change in the amount of residual urine volume was significantly larger in the solifenacin- than tadalafil-treated group; other parameters, including lower urinary tract symptoms and uroflowmetry measures, did not differ significantly between the two groups. Seven (18%) and 12 (32%) patients in the tadalafil and solifenacin groups, respectively, discontinued treatment because of adverse events. The main reasons for discontinuation in the tadalafil group were stomach discomfort or nausea and dizziness or vertigo; voiding difficulty and constipation were the main reasons for discontinuation in the solifenacin group. There was no significant difference in blood pressure fluctuations from baseline between the two groups. Tadalafil add-on therapy was not inferior to solifenacin add-on therapy in terms of effect and safety. Therefore, tadalafil could be an alternative add-on drug for patients with persistent lower urinary tract symptoms refractory to α

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