title: Tadalafil dosed once a day in men with erectile dysfunction: a randomized, double-blind, placebo-controlled study in the US.
abstract: The efficacy and safety of tadalafil, dosed once a day for the treatment of erectile dysfunction, was assessed in a randomized, double-blind, placebo-controlled, parallel-design study at 15 US centers. Following a 4-week treatment-free run-in period, patients (>or=18 years of age) were randomly assigned to 24 weeks treatment with tadalafil 2.5 mg, tadalafil 5 mg or placebo. Primary efficacy endpoints were change at 24 weeks in International Index of Erectile Function Erectile Function (EF) Domain score and mean per-patient percentage 'yes' responses to Sexual Encounter Profile diary questions 2 and 3. Tadalafil significantly improved erectile function compared with placebo for all three co-primary efficacy endpoints. Few patients discontinued because of adverse events (2.1%, placebo; 6.3%, tadalafil 2.5 mg; 4.1%, tadalafil 5 mg). Common treatment-emergent adverse events (>or=5%) were nasopharyngitis, influenza, viral gastroenteritis and back pain. Tadalafil 2.5 mg and 5 mg, dosed once a day for 24 weeks, was well tolerated and significantly improved erectile function.
authors.affiliation: Division of Urology, Harbor-UCLA Medical Center, Torrance, CA 90509, USA. jrajfer@ucla.edu
authors.forename: J
authors.initials: J
authors.lastname: Rajfer
authors.forename: P J
authors.initials: PJ
authors.lastname: Aliotta
authors.forename: C P
authors.initials: CP
authors.lastname: Steidle
authors.forename: W P
authors.initials: WP
authors.lastname: Fitch
authors.forename: Y
authors.initials: Y
authors.lastname: Zhao
authors.forename: A
authors.initials: A
authors.lastname: Yu
mesh_terms: D000328:Adult; D000368:Aged; D002243:Carbolines / Q000008:administration & dosage* / Q000009:adverse effects; D004305:Dose-Response Relationship, Drug; D004311:Double-Blind Method; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010410:Penile Erection; D010726:Phosphodiesterase Inhibitors / Q000008:administration & dosage*; D010919:Placebos; D000068581:Tadalafil; D016896:Treatment Outcome; D014481:United States
chemical_list: D002243:Carbolines; D010726:Phosphodiesterase Inhibitors; D010919:Placebos; D000068581:Tadalafil