Overview A Long-Term Study of Brexpiprazole in Patients With Major Depressive Disorder Status: Completed Trial end date: 2021-04-13 Target enrollment: Participant gender: Summary This trial is a 52-week study to assess the safety of long-term use of brexpiprazole as adjunctive therapy in combination with an antidepressant. Phase: Phase 3 Details Lead Sponsor: Otsuka Pharmaceutical Co., Ltd.Treatments: Brexpiprazole