Quetiapine augmentation in patients with treatment resistant obsessive-compulsive disorder: a single-blind, placebo-controlled study

Int Clin Psychopharmacol. 2002 May;17(3):115-9. doi: 10.1097/00004850-200205000-00004.


Recently, atypical antipsychotics have been used for the management of the patients with refractory obsessive-compulsive disorder (OCD). The aim of the present study was to evaluate the results of quetiapine augmentation to a serotonin reuptake inhibitor (SRI) in the patients with refractory OCD. Fifty-two patients with OCD according to DSM-IV entered 3 months of an open-label phase treatment with a SRI with or without concomitant adjunctive treatment regimen. Of them, 27 patients were refractory OCD. These patients were randomly divided into two groups, SRI plus quetiapine and SRI plus placebo, for an 8-week single-blind phase. The course of OCD was evaluated by Yale-Brown Obsession-Compulsion (Y-BOCS) and Clinical Global Impression-Severity of Illness and Improvement (CGI-SI and I) Scales every other week for 8 weeks. Of the 14 patients in group I, nine (64.4%) showed significant improvement with 60% or greater improvement on the Y-BOCS and one (7.1%) partial improvement with 30% or greater improvement on the Y-BOCS, whereas no improvement was observed in group II. The addition of quetiapine to ongoing SRI therapy has been found to be effective and well-tolerated approach in patients with refractory OCD.

Publication types

  • Clinical Trial
  • Randomized Controlled Trial

MeSH terms

  • Administration, Oral
  • Adolescent
  • Adult
  • Antipsychotic Agents / administration & dosage
  • Antipsychotic Agents / pharmacology*
  • Dibenzothiazepines / administration & dosage
  • Dibenzothiazepines / pharmacology*
  • Drug Resistance
  • Drug Therapy, Combination
  • Female
  • Humans
  • Male
  • Obsessive-Compulsive Disorder / drug therapy*
  • Placebos
  • Quetiapine Fumarate
  • Selective Serotonin Reuptake Inhibitors / therapeutic use*
  • Single-Blind Method
  • Treatment Outcome


  • Antipsychotic Agents
  • Dibenzothiazepines
  • Placebos
  • Serotonin Uptake Inhibitors
  • Quetiapine Fumarate