Important information on the use of potassium iodide (KI) tablets
Illinois. Dept. of Nuclear Safety. Division of Planning and Preparedness
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Thyroid Gland Radiation-Protective Agents Prevention
KI is a non-prescription drug used to provide a "loading dose" of stable iodine to the thyroid when there is a risk that an individual might be exposed to a potentially harmful quantity of radioactive iodine.