Study Evaluating DVS-233 SR In Adult Outpatients With Major Depressive Disorder

Inclusion criteria in the open-label phase:

• Outpatients
• Men and women 18 to 75 years of age, inclusive. Sexually active women participating in the study must use a medically acceptable form of contraception (Medically acceptable forms of contraception include oral contraceptives, injectable or implantable methods, intrauterine devices, or properly used barrier contraception)
• Subjects must have a primary diagnosis of MDD based on the criteria in the Diagnostic and Statistical Manual of Mental Disorders, 4th edition (DSM-IV), single or recurrent episode, without psychotic features (If other allowable psychiatric diagnoses are present, MDD must be the predominant psychiatric disorder present.)

Exclusion Criteria:

• Treatment with DVS-233 SR at any time in the past
• Treatment with venlafaxine (immediate release [IR] or ER) within 90 days of study day 1
• Known hypersensitivity to venlafaxine (IR or ER)