A Multicenter, Randomized, Double-Blind, Placebo-Controlled, Duloxetine-Referenced, Parallel-Group Study to Evaluate the Efficacy and Safety of 2 Fixed Doses (50mg, 100mg) of Desvenlafaxine Sustained-Release Tablets in Adult Outpatients With Major Depressive Disorder

The primary purpose of this study is to evaluate the efficacy and safety of two doses of DVS SR (50 and 100 mg/day) in the treatment of adults with Major Depressive Disorder.

本研究的首要目标为评估两种剂量的DVS缓释制剂（DVS SR，每日50mg与100mg）治疗成人重度抑郁症（Major Depressive Disorder）的有效性与安全性。