This study will evaluate the efficacy of quetiapine extended-release as adjunctive therapy to cognitive behavioral therapy (CBT) compared to CBT plus placebo in the treatment of patients with comorbid major depression and generalized anxiety disorder. We will also evaluate the quality of life in patients with comorbid MDD/GAD, the response and remission rates by treatment group, changes in sleep quality, and tolerability of adjunctive quetiapine to CBT.
