Overview Efficacy and Safety Study of ABT-436 in Major Depressive Disorder Status: Terminated Trial end date: 2015-08-01 Target enrollment: Participant gender: Summary The purpose is to study the efficacy and safety of ABT-436 in Major Depressive Disorder. Phase: Phase 2 Details Lead Sponsor: AbbVie (prior sponsor, Abbott)Treatments: CitalopramDexetimide