title: Lack of efficacy of low doses of quetiapine addition in refractory obsessive-compulsive disorder.
abstract: BACKGROUND
  Some studies have shown that low dose of neuroleptic addition to ongoing antiobsessive treatment might be effective in treatment resistant obsessive-compulsive disorder (OCD). The primary purpose of this study was to evaluate the efficacy of low-dose quetiapine in clomipramine and serotonin reuptake inhibitor-refractory obsessive-compulsive disorder patients.
  
  
  METHODS
  Eight obsessive-compulsive disorder patients who were resistant to treatment after 2 or more inadequate trials with clomipramine or serotonin reuptake inhibitor were admitted to the study. The patients were administrated on open trial of quetiapine at daily dose of 150 mg. Treatment response was assessed using the Yale-Brown Compulsive Scale and the Clinical Global Impressions Scale.
  
  
  RESULTS
  Only 2 patients were partial responders, with Yale-Brown Compulsive Scale score decreases of 28% and 29%.
  
  
  CONCLUSIONS
  The results of this preliminary open trial suggest that low dose of quetiapine may not be effective in treatment-resistant obsessive-compulsive disorder patients. Larger placebo-controlled trials are needed to investigate the clinical efficacy of quetiapine addition at low doses to antiobsessive treatment in treatment-refractory obsessive-compulsive disorder.
authors.affiliation: Department of Psychiatry, Adnan Menderes University, Aydin, Turkey. isevincok@hotmail.com
authors.forename: Levent
authors.initials: L
authors.lastname: Sevincok
authors.forename: Ayse
authors.initials: A
authors.lastname: Topuz
mesh_terms: D000293:Adolescent; D000328:Adult; D003987:Dibenzothiazepines / Q000008:administration & dosage*; D005260:Female; D006801:Humans; D008875:Middle Aged; D009771:Obsessive-Compulsive Disorder / Q000188:drug therapy* / Q000523:psychology*; D011569:Psychiatric Status Rating Scales / Q000706:statistics & numerical data; D000069348:Quetiapine Fumarate; D016896:Treatment Outcome
chemical_list: D003987:Dibenzothiazepines; D000069348:Quetiapine Fumarate