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Effexor, 2.93 / 5 (45 votes)

Effexor Side Effects

effexor tablets package
Effexor (venalfaxine) contains an FDA mandated black box warning due to an increased risk of suicidal thinking among children and young adults treated with this and other anti-depressant medications. The black box warning is a serious advisement placed on the packaging insert of medications to indicate possible serious, or life-threatening complications. In addition, the FDA sent a warning letter to the makers of Effexor in 2007 criticizing unsubstantiated claims of superior efficacy and minimized risk. Other Effexor side effects include:
  • Nausea
  • Headache
  • Drowsiness
  • Confusion
  • Anxiety
  • Loss of appetite
  • Fatigue
  • Sexual Side Effects
  • Flu-like Symptoms
  • Unusual thoughts
  • High Cholesterol
  • Changes in weight
  • Infections
  • Changes in hair color
  • Balanitis
One of the rarest and most life-threatening Effexor side effects is serotonin syndrome, a serious and sometimes deadly reaction to too much serotonin in the body. Symptoms occur within minutes to hours of onset and includes:
  • Agitation
  • Diarrhea
  • Fast or irregular heartbeat
  • Loss of coordination and Hallucinations
  • Over reactive reflexes
  • Tremor, or
  • Confusion
If you or someone you know has experienced a serious Effexor side effects, let us know about it. Doing so can pass on valuable information to other users.