An Eight-week, Double-blind, Placebo-controlled Study to Evaluate the Efficacy, Safety, and Tolerability of Saredutant 100 mg Once Daily in Combination With Escitalopram 10 mg Once Daily in Patients With Major Depressive Disorder

The main purpose of this study is to evaluate the efficacy of saredutant 100mg once daily in combination with escitalopram 10mg once daily compared to saredutant placebo in combination with escitalopram 10mg once daily in patients with major depressive disorder. This study also includes a double-placebo group (saredutant placebo in combination with escitalopram placebo).