Randomized, double-blind, placebo-controlled 8-week trial of the efficacy, safety, and tolerability of 5, 10, and 20 mg/day vortioxetine in adults with major depressive disorder.

While vortioxetine failed to meet significance versus placebo in the primary efficacy analysis, there was evidence of efficacy for the 10- and 20-mg doses in secondary analyses. Vortioxetine was safe and well tolerated. Additional studies appear warranted.