Prevention of Seasonal Affective Disorder

Inclusion Criteria: (Patient must meet these criteria in order to be eligible for this study.) Patient has a history of Major Depressive Disorder (MDD) with a seasonal pattern. Exclusion Criteria: (Patient cannot meet these criteria in order to be eligible for this study.) Patient has a current or past history of seizure disorder or brain injury. Patient has a history or current diagnosis of anorexia nervousa or bulimia. Patient has recurrent summer depression more frequently than winter depression. Patient has primary diagnosis of panic disorder, Obsessive Compulsive Disorder (OCD), Posttraumatic Stress Disorder (PTSD), acute distress disorder, bipolar II disorder or other psychotic disorders. Patient has initiated psychotherapy within the last 3 months.