Open-Label Comparative Study of Risperidone Versus Olanzapine Versus Quetiapine for Mania in Children and Adolescents With Bipolar I and Bipolar II Disorder

Inclusion Criteria: * Males and females age 6 to 18 years of age * Patient must have a diagnosis of bipolar I or bipolar II disorder and currently displaying an acute manic, hypomanic, or mixed episode (with or without psychotic features) according to the DSM-IV based on clinical assessment and confirmed by structured diagnostic interview (Kidd Schedule of Affective Disorders). * Patients must have an initial score on the Y-MRS total score of at least 15. * Patient must be able to participate in mandatory blood draws. * Patient must be able to swallow pills. Exclusion Criteria: * Patients with chronic medical illness, DSM-IV substance dependence within the past 6 months, pregnant or nursing females, and those at serious risk of suicide will be excluded from the study