What are the possible side effects of venlafaxine (Effexor, Effexor XR)?
Get emergency medical help if you have any of these signs of an allergic reaction: skin rash or hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Contact your doctor promptly if you have any of the following side effects, especially if they are new symptoms or if they get worse: mood changes, anxiety, panic attacks, trouble sleeping, irritability, agitation, aggressiveness, severe restlessness, mania (mental and/or physical hyperactivity), thoughts of suicide or hurting yourself. Call your doctor at once if you have any of these serious side effects: • increased blood pressure (severe headache, blurred vision); • easy bruising or bleeding; • severe blistering, peeling, and red skin rash; • very stiff (rigid) muscles, high fever, sweating, fast or uneven heartbeats, tremors, overactive reflexes; • nausea, vomiting, diarrhea, loss of appetite, feeling unsteady, loss of coordination; or • headache, trouble concentrating, memory problems, weakness, confusion, hal
