This meta analysis of antidepressants in MDD included 34 double-blind, randomized, placebo-controlled studies covering 20 antidepressants. Outcomes were 6-month relapse rates and tolerability measures. Fourteen of the agents had better relapse rates than placebo. Four — desvenlafaxine, paroxetine, venlafaxine, and vortioxetine — displayed the best efficacy and tolerability.