Levomilnacipran is an antidepressant currently approved in Canada to treat Major Depressive Disorder (MDD). Thirty-six healthy male participants will receive escalating doses of levomilnacipran, duloxetine, or placebo every 7 days (+/- 1 day) throughout a 20 - 28 day period. After each dose escalation study participants will be asked to come to the clinic to conduct the necessary tests - these will include tyramine pressor tests as well as blood draws. The results of this study will allow the investigators to determine the dose(s) of levomilnacipran at which reuptake inhibition of norepinephrine and serotonin (chemicals utilized by nerve cells to transmit information to other cells) is achieved.