A Phase 3 Study to Evaluate the 1-Year Efficacy and Safety of Udenafil 75 mg Once Daily in Patients with Erectile Dysfunction

Abstract

Introduction Once-daily administration of phosphodiesterase type 5 inhibitors has been shown to correct erectile dysfunction (ED). Aim To evaluate the long-term efficacy and safety after once-daily oral administration of udenafil 75 mg in men with ED. Methods This clinical trial was an open-label, fixed-dose, 24-week extension study (DA8159_EDDL_III) of a 24-week double-blinded efficacy and safety study of once-daily udenafil (parent study: DA8159_EDD_III). Subjects received udenafil 75 mg once daily for 24 weeks during this extension study, and the follow-up visit occurred during the 4-week ED treatment-free period. Main Outcome Measures Subjects were asked to complete the International Index of Erectile Function questionnaire and the Global Assessment Questionnaire at the 24-week extension and after the 4-week ED treatment-free period, and the development of adverse drug reactions was investigated. Results In total, 302 subjects were enrolled in this extension study. Improvement was shown with an increased erectile function (EF) domain score compared with baseline (14.60 ± 4.57) at extension week 48 (23.98 ± 5.44) and a slight increase in EF domain score compared with the last time point (week 24) of the parent study (P < .001). The Global Assessment Questionnaire showed a high improvement rate of 95.4% at the extension 48-week time point. For shift to normal, almost half the subjects (45.1%) recovered “normal” EF, and 14.2% of subjects reported normal erections after the 4-week ED treatment-free period. The occurrence rate of adverse drug reactions was 8%, which consisted mainly of flushing and headache. Conclusion Once-daily dosing of udenafil 75 mg showed excellent efficacy and safety with long-term administration and allowed a more spontaneous sexual life.

Obesity and Erectile Dysfunction: From Bench to Clinical Implication

“…PDE5 inhibitors are widely prescribed for the treatment of patients with ED. PDE5 inhibition prevents the degradation of cyclic guanosine monophosphate and elevates NO bioavailability [78]. In addition, numerous studies have reported that PDE5 inhibitors have beneficial systemic effects.…”

“…It has been established that obesity and ED share an internal pathological environment, thus, targeting obesity as an underlying factor of ED may be an important therapeutic approach to maximize the efficacy of treatment. Moreover, once daily prescription for a long time with low dose PDE5 inhibitors is settled down as a trend of ED treatment currently [78]. It has become increasingly important to focus on the systemic and metabolic effects of PDE5 inhibitors, especially in patients with ED and comorbid medical conditions.…”