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Medications and Drugs

Brand Names: iOSAT, ThyroSafe, ThyroShield

Generic Name: potassium iodide (Pronunciation: poe TAH see um EYE oh dide)

What is potassium iodide (iOSAT, ThyroSafe, ThyroShield)?

Potassium iodide is the potassium salt form of iodide, a naturally occurring substance.

Potassium iodide can be used as an expectorant to thin mucus and loosen congestion in your chest and throat.

Potassium iodide is used in people with chronic breathing problems that can be complicated by thick mucus in the respiratory tract, such as asthma, chronic bronchitis, or emphysema.

Potassium iodide may also be used for purposes not listed in this medication guide.

What are the possible side effects of potassium iodide (iOSAT, ThyroSafe, ThyroShield)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives, itching, severe tingling; fever, swollen glands, joint pain; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medicine and call your doctor at once if you have:

  • swelling in your neck or throat (enlarged thyroid);
  • chest pain, rapid or irregular heart rate, feeling anxious or irritable;
  • severe headache, metallic taste in your mouth;
  • puffy eyelids, irritated eyes, acne or severe skin rash;
  • pain or burning in your mouth or throat, increased salivation;
  • fever, cold symptoms (stuffy nose, sneezing, sore throat);
  • high potassium (slow heart rate, weak pulse, muscle weakness, tingly feeling).

Common side effects may include:

  • swollen glands in your lower jaw;
  • nausea, vomiting, diarrhea, upset stomach, or stomach pain;
  • confusion, tired feeling, numbness;
  • mild skin rash; or
  • weakness or heavy feeling in your hands or feet.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about potassium iodide (iOSAT, ThyroSafe, ThyroShield)?

Potassium iodide is used to thin mucus and loosen congestion in people with chronic breathing problems that can be complicated by thick mucus in the respiratory tract.

Potassium iodide can cause thyroid problems, high potassium levels in your blood, or iodide poisoning. Call your doctor at once if you have swelling in your neck or throat, chest pain, irregular heart rate, muscle weakness, tingly feeling, pain or burning in your mouth, severe headache, or eye irritation.



Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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