Addition of Quetiapine in Obsessive Compulsive Disorder - Westenberg Study
Quetiapine (Seroquel ®), an atypical antipsychotic registered for use in schizophrenia, which has a very low propensity of extrapyramidal and endocrine side-effects, has also been studied as an adjunct in OCD. In an open trial, ten patients with OCD who had not responded to at least three previous treatments with a SRI at maximum dose and duration were assigned to receive quetiapine in addition to a SRI for 8 weeks. Given the efficacy of quetiapine in treatment resistant patients, and given its rapid onset of action (4-6 weeks), it is postulated that the combination of a low dose atypical antipsychotic and a standard dosage of an SRI as a treatment for patients with OCD might increase the number of responders as well as the effect size.
PLEASE NOTE: Seroquel SR and Seroquel XR refer to the same formulation. The SR designation was changed to XR after consultation with FDA.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Primary Purpose: Treatment
|Official Title:||Quetiapine Augmentation to SRIs for Patients With Obsessive Compulsive Disorder, a Double-blind, Placebo-controlled Study|
- The change in Yale Brown obsessive compulsive scale (Y-BOCS) from baseline to week 10 and the number of responders are the primary efficacy parameters.
- Criteria for response will be a 25% or greater change from baseline on the Y-BOCS and a final CGI rating of "much improved or "very much improved".
- The onset of response to treatment, using the time to a sustained response as criterion
- Side effect profiles, Quality of life, Cognitive functioning
|Study Start Date:||December 2003|
|Study Completion Date:||August 2006|