Effectiveness Study of Scopolamine Combined With Escitalopram in Patients With MDD

Despite the availability of a wide range of antidepressant drugs, clinical trials indicate that 30% to 40% of patients with major depression fail to respond to first-line antidepressant treatment, despite adequate dosage, duration, and compliance. Moreover, in those patients who do experience symptomatic relief following conventional anti-depressant treatment, clinical improvement is not evident for 3-4 weeks. Thus, there is a clear need to develop novel and improved therapeutics for unipolar depression. A previous study showed that the intravenous administration of scopolamine produces antidepressant effects. This study is designed to determine if scopolamine combine with Escitalopram produce antidepressant effects at an early stage.