A Study to Assess the Efficacy and Safety of TC-5214 as an Adjunct Therapy in Patients With Major Depressive Disorder

A Multicenter, Randomized, Double-Blind, Parallel Group, Placebo-Controlled, Phase III Efficacy and Safety Study of TC-5214 (S-mecamylamine) in Flexible Doses as an Adjunct to an Antidepressant in Patients With Major Depressive Disorder Who Exhibit an Inadequate Response to Antidepressant Therapy

The purpose of this study is to determine if TC-5214 or placebo (a tablet that looks like medicine tablet or capsule, but contains no active medicine) is safe and effective when taken together with another antidepressant.

A Multicenter, Randomized, Double-Blind, Parallel Group, Placebo-Controlled, Phase III Efficacy and Safety Study of TC-5214 (S-mecamylamine) in Flexible Doses as an Adjunct to an Antidepressant in Patients with Major Depressive Disorder Who Exhibit an Inadequate Response to Antidepressant Therapy

Inclusion Criteria:

• Provision of signed and dated informed consent before initiation of any study-related procedures.
• The patient must have a clinical diagnosis of major depressive disorder (MDD) with inadequate response to no more than one antidepressant.
• Out-patient status at enrollment and randomization.

Exclusion Criteria:

• Patients with a lifetime history of bipolar disorder, psychotic disorder or post-traumatic stress disorder.
• Patients with a history of suicide attempts in the past year and/or seen by the investigator as having a significant history of risk of suicide or homicide.
• History of renal insufficiency or impairment or conditions that could affect absorption or metabolism of the investigational product in this patient population