Objectives: To determine the efficacy, safety, and treatment satisfaction of tadalafil 20 mg for erectile dysfunction (ED) in patients evaluated at tertiary-care academic centers.
Methods: In this randomized, double-blind, placebo-controlled trial, patients were randomly allocated to receive fixed-dose tadalafil 20 mg (n = 146) or placebo (n = 49) for 12 weeks. Efficacy was assessed by the International Index of Erectile Function (IIEF), Sexual Encounter Profile (SEP), and Global Assessment Question (GAQ); patient and partner treatment satisfaction by the Erectile Dysfunction Inventory of Treatment Satisfaction (EDITS) and SEP; and safety by adverse events, laboratory values, and vital signs.
Results: Mean baseline IIEF erectile function (EF) domain was 12.98. Fifty-one percent of enrolled patients had severe baseline ED, and 82% had organic ED. Pre-existing, ED-associated comorbid conditions were common. When compared with patients treated with placebo, those receiving tadalafil reported significant improvement from baseline in the IIEF EF domain (P <0.001), successful penetration attempts (SEP question 2; P <0.001), successful intercourse (SEP question 3; P <0.001), and all secondary efficacy outcomes (P <0.001). Patients and their sexual partners were also significantly more satisfied with tadalafil treatment (P <0.001), including overall satisfaction (P <0.001) and length of time the treatment worked (P <0.001). Mild or moderate headache, dyspepsia, and myalgia were the most frequent treatment-emergent adverse events reported.
Conclusions: Tadalafil significantly improved erectile function and patient and partner satisfaction and was well tolerated. These results were observed in a tertiary-care, academic center population with a high incidence of severe, organic ED, and comorbid medical conditions, factors known to compromise erectile function and treatment outcome.
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