Overview Brain Energy Metabolism in Individuals With Major Depressive Disorder Receiving Escitalopram Status: Completed Trial end date: 2009-06-01 Target enrollment: Participant gender: Summary This study will evaluate changes in brain energy metabolism due to treatment with escitalopram in people with major depressive disorder. Phase: Phase 4 Details Lead Sponsor: Massachusetts General HospitalNational Institute of Mental Health (NIMH)Treatments: CitalopramDexetimide