Description of Treatment Management of Patients With Major Depressive Disorder and Inadequate Response

Inclusion Criteria: * Diagnosis of MDD as per DSM-IV * Patients with an inadequate disease control during antidepressant therapy * Patients who already receive add-on therapy and have completed 4-5 weeks of treatment at the time of their enrolment in the study. Exclusion Criteria: * Patients fulfilling criteria for diagnosis of any other psychiatric condition (except for MDD), as per DSM-IV Axis I, * Concomitant organic mental disorder or mental retardation Substance abuse or dependence (with the exception of nicotine dependence), as defined by DSM-IV criteria Participation in another study