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What are the side effects of quinidine?

Based on information from iGuard.org, a free medication monitoring service, 16% of patients experience side effects while taking Quinidine. Some of the side effects reported by iGuard members include:

  • Light Sensitivity 
  • Diarrhea 
  • Headache 
Please follow up with your doctor or other healthcare provider if you are experiencing any symptoms that worsen or do not go away.
Common side effects of quinidine (sulfate and gluconate forms) include: diarrhea, loss of appetite, muscle weakness, mild upset stomach, headaches, nausea, or vomiting. These side effects are not serious and only require medical attention if they do not go away or suddenly worsen. Quinidine may cause serious side effects, including allergic reactions. If you experience signs of an allergic reaction, such as swelling, hives and difficulty breathing, seek immediate medical attention. Talk to your doctor if you experience any of these rare but serious side effects: ringing in the ears, changes in vision, dizziness, fainting, rapid heartbeat, headaches, abdominal pain, chest pain or yellowing of the skin or eyes. Quinidine may cause unexpected side effects that are not described above. If you experience an unanticipated reaction while taking quinidine, talk to your doctor.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.