Effexor (venlafaxine) is used in adults to treatmajor depressive disorder. Effexor XR extended-release (long-acting) capsules are also used to treatgeneralized anxiety disorder(GAD; excessive worrying that is difficult to control), social anxiety disorder (extreme fear of interacting with others or ...
Serious side effects of Effexor XR Along with its needed effects, venlafaxine (the active ingredient contained in Effexor XR) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention. ...