Description:Venlafaxine free base (Wy-45030; Wy45030; Effexor, Lanvexin, Viepax and Trevilor) is a marketed and arylalkanolamine-based antidepressant acting as an serotonin-norepinephrine reuptake inhibitor (SNRI). It is used to treat various disorders including major depressive disorder (MDD), panic disorder and social phobia, generalised anxiety disorder (GAD).