title: Evaluation of therapeutic response of patients with erectile dysfunction.
abstract: BACKGROUND
  All three phosphodiesterase-5 (PDE5) inhibitors for the treatment of the erectile dysfunction have similar efficacy and toxicity profiles. Sildenafil and vardenafil have similar molecular structures, but tadalafil is structurally different, which is reflected in its pharmacokinetic profile. These pharmacokinetic differences among the PDE5 inhibitors may underlie patient preference, an important and emerging aspect of ED therapy.
  
  
  OBJECTIVE
  The study is conducted to show and compare efficacy and safety of the three PDE-5 inhibitors and to assess patient's preference in the treatment of erectile dysfunction. It's still unknown which of the three PDE-5 inhibitors is used the most.
  
  
  METHODS
  Study is conducted during two years on 53 patients with erectile dysfunction. Evaluation is done after 8 weeks of initial treatment followed by a 1-week washout period and then continued the therapy with the second and third medicine by the same protocol.
  
  
  RESULTS
  After three months of the treatment, patients' preference was as follows: 33 patients (62%) choose tadalafil, 13 patients (24%) choose sildenafil and 7 patients (14%) choose vardenafil. Choice of PDE-5 for initial treatment was a significant predictor for substitution from one drug to another.
  
  
  CONCLUSIONS
  Frequency of sexual intercourse (occasional use or regular therapy) and personal experience will determine the medicine of choice. When choosing medicine, attention should be paid to the beginning of its functioning, duration and possible interaction with food.
authors.affiliation: Urology Clinic, University of Sarajevo Clinical Center, Sarajevo, Bosnia and Herzegovina.
authors.forename: Junuzovic
authors.initials: J
authors.lastname: Dzelaludin
authors.forename: Sejfudin
authors.initials: S
authors.lastname: Bajramovic
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002243:Carbolines / Q000627:therapeutic use; D007172:Erectile Dysfunction / Q000188:drug therapy*; D006801:Humans; D007093:Imidazoles / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D057240:Patient Preference; D010726:Phosphodiesterase Inhibitors / Q000627:therapeutic use*; D010879:Piperazines / Q000627:therapeutic use; D011687:Purines / Q000627:therapeutic use; D000068677:Sildenafil Citrate; D013450:Sulfones / Q000627:therapeutic use; D000068581:Tadalafil; D014227:Triazines / Q000627:therapeutic use; D000069058:Vardenafil Dihydrochloride; D055815:Young Adult
chemical_list: D002243:Carbolines; D007093:Imidazoles; D010726:Phosphodiesterase Inhibitors; D010879:Piperazines; D011687:Purines; D013450:Sulfones; D014227:Triazines; D000069058:Vardenafil Dihydrochloride; D000068581:Tadalafil; D000068677:Sildenafil Citrate