A Six Week, Randomized, Double-Blind Placebo-Controlled, Suvorexant Augmentation Study of Antidepressant Treatment of Major Depressive Disorder With Residual Insomnia

Many patients with depression suffer from residual insomnia. This study is a six week, randomized, double-blind, placebo-controlled, trial to study suvorexant augmentation of continuing antidepressant therapy against placebo with continuing antidepressant therapy. Patient volunteers must be on a stable antidepressant treatment and will remain on this treatment for the duration of the study. Patient volunteers that qualify and enroll in the clinical trial will either receive suvorexant 10 mg/day and may have it adjusted to a dose of either 15 mg or 20 mg/day. Treatment is for a total of six weeks in addition to a clinical follow-up visit.