title: Efficacy and safety of avanafil for treating erectile dysfunction: results of a multicentre, randomized, double-blind, placebo-controlled trial.
abstract: Study Type--Therapy (RCT) Level of Evidence 1b. What's known on the subject? and What does the study add? Avanafil is a potent selective phosphodiesterase type 5 (PDE5) inhibitor newly developed for treating erectile dysfunction (ED). Preclinical and clinical phase I studies showed that avanafil had enhanced selectivity, faster onset of action and a favourable side-effect profile relative to currently available PDE5 inhibitors. As the result of phase III clinical trial for the efficacy and safety of avanafil treatment (100 and 200 mg), taken as needed over a period of 12 weeks, in Korean patients with ED, avanafil is an effective and well-tolerated therapy for ED of broad-spectrum aetiology and severity.
  
  
  OBJECTIVE
  • To evaluate the efficacy and safety of avanafil, a new potent selective phosphodiesterase type 5 (PDE5) inhibitor, in patients with erectile dysfunction (ED).
  
  
  METHODS
  • The present study was a multicentre, randomized, double-blind, placebo-controlled, fix-dosed phase three clinical trial involving 200 patients with ED. • The subjects were treated with placebo or avanafil (100 or 200 mg) for 12 weeks and were asked to complete the International Index of Erectile Function (IIEF), the Sexual Encounter Profile (SEP) diary, and the Global Assessment Questionnaire (GAQ). • The primary outcome variable was the change from baseline for IIEF erectile function domain (EFD) score. • The secondary outcome variables were SEP Q2 and Q3, the shift to normal rate (EFD ≥ 26), and response to the GAQ.
  
  
  RESULTS
  • Compared with placebo, patients who took 100 or 200 mg of avanafil had significantly improved IIEF-EFD score. • There were similar results when comparing Q2 and Q3 in the SEP diary and the GAQ. • Flushing was the most common treatment-related adverse event. • Most adverse events were transient and mild or moderate in severity.
  
  
  CONCLUSIONS
  • Avanafil is an effective and well-tolerated therapy for ED of broad-spectrum aetiology and severity.
authors.affiliation: Department of Urology, Chonbuk National University Medical School, Jeonju, Korea.
authors.forename: Chen
authors.initials: C
authors.lastname: Zhao
authors.forename: Sae Woong
authors.initials: SW
authors.lastname: Kim
authors.forename: Dae Yul
authors.initials: DY
authors.lastname: Yang
authors.forename: Je Jong
authors.initials: JJ
authors.lastname: Kim
authors.forename: Nam Cheol
authors.initials: NC
authors.lastname: Park
authors.forename: Sung Won
authors.initials: SW
authors.lastname: Lee
authors.forename: Jae Seung
authors.initials: JS
authors.lastname: Paick
authors.forename: Tai Young
authors.initials: TY
authors.lastname: Ahn
authors.forename: Ki Hak
authors.initials: KH
authors.lastname: Moon
authors.forename: Woo Sik
authors.initials: WS
authors.lastname: Chung
authors.forename: Kweon Sik
authors.initials: KS
authors.lastname: Min
authors.forename: Jun-Kyu
authors.initials: JK
authors.lastname: Suh
authors.forename: Jae Seog
authors.initials: JS
authors.lastname: Hyun
authors.forename: Kwangsung
authors.initials: K
authors.lastname: Park
authors.forename: Jong Kwan
authors.initials: JK
authors.lastname: Park
mesh_terms: D004311:Double-Blind Method; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010410:Penile Erection / Q000187:drug effects; D058986:Phosphodiesterase 5 Inhibitors / Q000008:administration & dosage* / Q000009:adverse effects; D011743:Pyrimidines / Q000008:administration & dosage* / Q000009:adverse effects; D016896:Treatment Outcome
chemical_list: D058986:Phosphodiesterase 5 Inhibitors; D011743:Pyrimidines; C553414:avanafil