Overview Safety & Efficacy Study of Quetiapine Fumarate (SEROQUEL®) vs. Placebo in Major Depressive Disorder Status: Completed Trial end date: 2007-05-01 Target enrollment: Participant gender: Summary This study is to evaluate that (SEROQUEL®) quetiapine sustained-release is efficacious and safe in the treatment of patients with MDD. Phase: Phase 3 Details Lead Sponsor: AstraZenecaTreatments: Quetiapine Fumarate