Effexor Side Effects

Effexor Side Effects to Report

• Signs of serotonin syndrome (a rare but dangerous problems associated with certain medications) such as:
   
  • Confusion or other mental changes
  • A rapid heart rate
  • Nausea, vomiting, or diarrhea
  • Hallucinations
  • Blood pressure changes
  • An irregular heart rhythm
  • Overactive reflexes
  • Fever, sweating, or shivering
  • Shakiness
  • Agitation
  • Seizures
  • Coma

• Suicidal thoughts or behavior (see Effexor and Suicide)
• Anxiety, agitation, or panic attacks
• Hostility or aggressiveness
• Engaging in unusual or dangerous activities
• Restlessness or inability to sit still
• Extreme elation, or a feeling of happiness that may switch back and forth with a depressed or sad mood
• Other unusual changes in behavior
• Difficulty breathing, coughing, or chest pain
• Heart palpitations
• Difficulty sleeping
• Signs of an allergic reaction, including:

• Unexplained rash
• Hives
• Itching
• Unexplained swelling
• Wheezing
• Difficulty breathing or swallowing.