Overview Study Evaluating Long-Term Safety of Effexor XR in Patients With Major Depression. Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary Phase III long-term safety study of Effexor XR in patients with major depression. Phase: Phase 3 Details Lead Sponsor: Wyeth is now a wholly owned subsidiary of PfizerTreatments: Venlafaxine Hydrochloride