title: [Effect of sildenafil on nocturnal penile tumescence].
abstract: OBJECTIVE
  To evaluate the efficacy of sildenafil on nocturnal penile tumescence (NPT).
  
  
  METHODS
  Thirty-five patients with erectile dysfunction (ED), 28 cases of organic ED and 7 cases of psychogenic ED, were treated with sildenafil 100 mg before bedtime. The NPT of the patients was observed by using NEVA.
  
  
  RESULTS
  Erectile function significantly improved in the 28 cases of organic ED (P < 0.05), but not in the 7 cases of psychogenic ED (P > 0.05).
  
  
  CONCLUSIONS
  Sildenafil can improve NPT of organic ED patients without sexual stimulation.
authors.affiliation: Department of Urology, Second Affiliated Hospital, Wenzhou Medical College, Wenzhou, Zhejiang 325027, China. chenzy96@sohu.com
authors.forename: Zhi-Yong
authors.initials: ZY
authors.lastname: Chen
authors.forename: Ying-He
authors.initials: YH
authors.lastname: Chen
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Zhu
authors.forename: You-Hua
authors.initials: YH
authors.lastname: He
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Shi-Kun
authors.initials: SK
authors.lastname: Yang
mesh_terms: D000328:Adult; D007172:Erectile Dysfunction / Q000188:drug therapy / Q000503:physiopathology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D010410:Penile Erection / Q000187:drug effects*; D010726:Phosphodiesterase Inhibitors / Q000494:pharmacology*; D010879:Piperazines / Q000494:pharmacology*; D011687:Purines / Q000494:pharmacology; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000494:pharmacology*
chemical_list: D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D000068677:Sildenafil Citrate