Quinidine: What Are The Possible Side Effects Of Quinidine


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What are the possible side effects of quinidine?


emt If you experience any of the following serious side effects, stop taking quinidine and seek emergency medical attention or contact your doctor immediately:
  • an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives);
  • a new or a worsening irregular heartbeat pattern;
  • chest pain or chest discomfort;
  • ringing in the ears;
  • changes in vision;
  • dizziness, fainting, or headache;
  • rash;
  • difficulty breathing;
  • abdominal pain, nausea, or vomiting; or
  • yellowing of the skin or eyes.

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

  • mild upset stomach;
  • headache;
  • decreased appetite;
  • diarrhea; or
  • muscle weakness.

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: September 09, 2004

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