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Qualaquin Warnings and Precautions

You may not be able to safely use Qualaquin if you have certain heart problems or autoimmune diseases. Other warnings and precautions with Qualaquin apply to women who are pregnant or breastfeeding. Also, you should not use this medication for the treatment or prevention of nighttime leg cramps, as it can cause potentially life-threatening reactions.

What Should I Tell My Healthcare Provider?

You should talk with your healthcare provider prior to taking Qualaquin® (quinine sulfate) if you have:
  • Kidney disease, such as kidney failure (renal failure)
  • Liver disease, such as hepatitis, cirrhosis, or liver failure
  • Had an abnormal electrocardiogram (ECG) or a heart problem known as QT prolongation
  • Heart rhythm problem, such as atrial fibrillation, also called afib.
  • Any other heart problems
  • Low levels of an enzyme called glucose-6-phosphate dehydrogenase (G6PD)
  • An autoimmune disease called myasthenia gravis
  • A history of inflammation of the eye nerve (optic neuritis)
  • Any allergies, including to foods, dyes, or preservatives.
Also, let your healthcare provider know if you are:
  • Pregnant or thinking of becoming pregnant
  • Breastfeeding.
Make sure to tell your healthcare provider about any other medications you are taking, including prescription and nonprescription medicines, vitamins, and herbal supplements.

Qualaquin Medication Information

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