potassium iodide

  • Pharmacy Author:
    Omudhome Ogbru, PharmD

    Dr. Ogbru received his Doctorate in Pharmacy from the University of the Pacific School of Pharmacy in 1995. He completed a Pharmacy Practice Residency at the University of Arizona/University Medical Center in 1996. He was a Professor of Pharmacy Practice and a Regional Clerkship Coordinator for the University of the Pacific School of Pharmacy from 1996-99.

  • Medical and Pharmacy Editor: Jay W. Marks, MD
    Jay W. Marks, MD

    Jay W. Marks, MD

    Jay W. Marks, MD, is a board-certified internist and gastroenterologist. He graduated from Yale University School of Medicine and trained in internal medicine and gastroenterology at UCLA/Cedars-Sinai Medical Center in Los Angeles.

What is the dosage for potassium iodide-oral?

Adults and children over 12 years of age and weight 150 lbs or greater:

  • Prevention of thyroid gland injury due to radiation: 130 mg by mouth once dailywith a maximum of one dose per day.
  • Expectorant: 300 – 600 mg by mouth every 6 to 8 hours.

Children:

Prevention of thyroid gland injury due to radiation:

  • Infants of less than 1 month: 16.25 mg by mouth once daily. Maximum one dose per day.
  • Infants of 1 month to children of 3 years of age: 32.5 mg by mouth once daily. Maximum one dose per day.
  • Children of 3 to 12 years of age: 65 mg by mouth once daily. Maximum one dose per day.

Expectorant: 60 – 250 mg by mouth every 6 hours.

Which drugs or supplements interact with potassium iodide-oral?

Potassium iodide should not be given together with sodium iodide I-131 (radioactive iodide) that is being used to treat thyroid disease, because potassium iodide can prevent the absorption of sodium iodide I-131 into the thyroid gland. Potassium iodide should be discontinued at least 3 to 4 days prior to using sodium iodide I-131.

Potassium iodide should be used with caution with lithium because concurrent use of both medications can lead to hypothyroidism.

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