Quetiapine Fumarate as Monotherapy in the Maintenance Treatment of Patients With Major Depressive Disorder

Inclusion Criteria: * Documented clinical diagnosis according to the DSM-IV (Diagnostic and Statistical Manual of Mental Disorders, 4th edition, text revision) meeting criteria 296.2x Major Depressive Disorder, * Single Episode, or 296.3x Major Depressive Disorder, Exclusion Criteria: * Patients with a DSM-IV Axis I disorder other than MDD w/in 6 months of enrollment, * Patients with a diagnosis of DSM-IV Axis II disorder which has a major impact on the patients current psychiatric status. * Patients whose current episode of depression\>12 months or \<4 weeks from enrollment