Efexor XREffexor XRWyeth. Rx quality 28 Tabs 75mg . The name of your medicine is Efexor-XR. It contains the active ingredient called venlafaxine hydrochloride.Efexor-XR capsules are used in the treatment and prevention of depression and in the treatment of anxiety, including avoidance or fear of social situations and the treatment of panic attacks.Depression can affect your whole body and may cause emotional and physical symptoms such as feeling low in spirit, being unable to enjoy life, poor appetite or overeating, disturbed sleep, loss of sex d .