The Antidepressant Effects Of The NMDA Antagonist, CP-101,606, In Patients With MDD

Inclusion Criteria: * Primary DSM-IV diagnosis of MDD Exclusion Criteria: * Subjects with evidence or history of clinically significant hematological, renal, endocrine, pulmonary, gastrointestinal, cardiovascular, hepatic, psychiatric, neurologic, or allergic disease (including drug allergies, but excluding untreated, asymptomatic, seasonal allergies at time of dosing).