Dantrolene: What Are The Possible Side Effects Of Dantrolene


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What are the possible side effects of dantrolene?


emt If you experience any of the following serious side effects, stop taking dantrolene and seek emergency medical attention:
  • an allergic reaction (difficulty breathing; closing of your throat; swelling of your lips, tongue, or face; or hives);
  • a rash or itching;
  • black, bloody, or tarry stools or severe diarrhea;
  • yellow skin or eyes; or
  • seizures.

Other, less serious side effects may be more likely to occur. Continue to take dantrolene and talk to your doctor if you experience

  • drowsiness, dizziness, weakness or fatigue;
  • diarrhea, constipation, upset stomach, or decreased appetite;
  • difficulty swallowing (use caution to prevent choking);
  • headache or insomnia;
  • depression or confusion;
  • blurred or abnormal vision; or
  • increased urination.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.



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Last updated: July 29, 2004

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