title: Sildenafil citrate treatment for erectile dysfunction after kidney transplantation.
abstract: OBJECTIVE
  Our goal was to analyze the morbidity of organic erectile dysfunction (ED) in kidney-transplant patients and to evaluate the efficacy and reliability of sildenafil citrate treatment.
  
  
  METHODS
  Sixty-five ED patients with normal graft function for 3 to 12 months after kidney transplantation were involved in our study. Erectile dysfunction was diagnosed in all the patients by the International Index of Erectile Dysfunction (IIEF). Among them, 10 patients were in light degree; 32 patients in moderate degree, and 23 patients in severe degree according to IIEF score. All of the patients underwent medical history, physical and chemical examinations. In each patient, the IIEF score, blood urea nitrogen, creatinine, and trough concentrations of cyclosporine were compared before and after taking sildenafil citrate at an initial dose of 50 mg every night.
  
  
  RESULTS
  Twenty-six patients without ED before transplantation suffered ED after the operation, and 32 patients with ED before transplantation noticed worsening. Taking sildenafil citrate was effective in 53 patients (81.54%). There were no statistical differences in blood urea nitrogen, creatinine, or trough concentrations of cyclosporine in patients before and after sildenafil treatment.
  
  
  CONCLUSIONS
  The morbidity of organic erectile dysfunction increased after transplantation. Sildenafil citrate treatment for ED in kidney-transplant patients was effective and safe. Graft function and trough concentrations of cyclosporine were not affected by sildenafil citrate.
authors.affiliation: Department of Urology, Beijing Chaoyang Hospital, No. 8 Baijia Zhuang Road, Beijing 100020, China. liangxlu@163bj.com
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: D L
authors.initials: DL
authors.lastname: Guan
authors.forename: T W
authors.initials: TW
authors.lastname: Ou
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: X
authors.initials: X
authors.lastname: Chen
authors.forename: N Z
authors.initials: NZ
authors.lastname: Xing
authors.forename: X D
authors.initials: XD
authors.lastname: Zhang
authors.forename: Y
authors.initials: Y
authors.lastname: Yang
mesh_terms: D001806:Blood Urea Nitrogen; D003404:Creatinine / Q000097:blood; D016572:Cyclosporine / Q000097:blood / Q000627:therapeutic use; D007172:Erectile Dysfunction / Q000188:drug therapy* / Q000209:etiology; D006801:Humans; D016030:Kidney Transplantation / Q000009:adverse effects*; D008297:Male; D010879:Piperazines / Q000627:therapeutic use*; D011687:Purines; D000068677:Sildenafil Citrate; D013450:Sulfones; D011795:Surveys and Questionnaires; D016896:Treatment Outcome; D014665:Vasodilator Agents / Q000627:therapeutic use*
chemical_list: D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014665:Vasodilator Agents; D016572:Cyclosporine; D003404:Creatinine; D000068677:Sildenafil Citrate