title: Long-term effects of finasteride on invasive urodynamics and symptoms in the treatment of patients with bladder outflow obstruction due to benign prostatic hyperplasia.
abstract: OBJECTIVE
  We assess the long-term effects of finasteride on bladder outlet obstruction and symptoms in the treatment of patients with benign prostatic hyperplasia.
  
  
  METHODS
  Of the original 36 patients assigned to treatment with 5 mg. finasteride daily (group 1) or placebo (group 2) for 6 months 27 completed an open extension study of 5 mg. finasteride for 4 more years. The possible relief of bladder outlet obstruction was monitored with repeated pressure-flow studies at baseline, 6 months and 4.5 years.
  
  
  RESULTS
  The treatment resulted in a further slight decrease in detrusor pressure at maximum flow rate in group 1 and a significant decrease in group 2 during the 4-year period, whereas improvement in maximum flow rate did not achieve statistical significance. Concomitantly, there was a significant improvement in obstructive and irritative symptoms.
  
  
  CONCLUSIONS
  Finasteride decreases bladder outlet obstruction moderately and only occasionally relieves it completely. However, the decrease in obstruction achieved in many patients is sufficient to improve the symptoms significantly. The beneficial effect is long-lasting.
authors.affiliation: Division of Urology, Tampere University Hospital, Finland.
authors.forename: T L
authors.initials: TL
authors.lastname: Tammela
authors.forename: M J
authors.initials: MJ
authors.lastname: Kontturi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D004311:Double-Blind Method; D018120:Finasteride / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011470:Prostatic Hyperplasia / Q000150:complications / Q000188:drug therapy* / Q000503:physiopathology; D013997:Time Factors; D014524:Urethral Obstruction / Q000188:drug therapy* / Q000209:etiology / Q000503:physiopathology; D014563:Urodynamics
chemical_list: D018120:Finasteride