Effexor is a type of serotonin-norepinephrine reuptake inhibitor that acts on certain chemicals in the brain (serotonin and norepinephrine). If the levels of these chemicals are unbalanced, they can cause depression. By balancing the levels of serotonin and norepinephrine, Effexor can treat depression and help prevent depression relapses.
(Click Effexor Uses for more information on how this antidepressant works and to learn more about Effexor indications, including other possible off-label uses.)