Multicenter, Randomized, Parallel-Group, Double-Blind, Placebo-Controlled Phase 3 Study of the Efficacy and Safety of Quetiapine Fumarate and Lithium as Monotherapy for up to 104 Weeks Maintenance Treatment of Bipolar I Disorder in Adult Patients

This is a multicenter, randomized, parallel-group, double-blind, placebo-controlled study to evaluate the efficacy and safety of quetiapine and lithium (comparator in the study) for up to 104 weeks of maintenance treatment in adult patients with Bipolar I Disorder. PLEASE NOTE: Seroquel SR and Seroquel XR refer to the same formulation. The SR designation was changed to XR after consultation with FDA.