Effexor XR Side Effects (Cont.)

Effexor XR Side Effects to Report

There are a number of less common but more serious side effects of Effexor XR that you should report to your healthcare provider. These include but are not limited to:
 
  • Suicidal thoughts or behavior (see Effexor XR 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
  • Hallucinations
  • Fast heart rate
  • Difficulty breathing, coughing, or chest pain
  • Heart palpitations 
  • Difficulty sleeping
  • Signs of an allergic reaction, including unexplained rash, hives, itching, unexplained swelling, wheezing, or difficulty breathing or swallowing.

 

Rare Effexor XR Side Effects

There are other possible Effexor XR side effects that can occur. These rare side effects occur in less than 1 percent of patients. It is difficult to tell whether these side effects are actually caused by the medication or something else.
 
Some of these rare Effexor XR side effects include but are not limited to:
 

 

(Effexor XR Side Effects Continued: Page 3)

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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;