RT Book, Section A1 Rella, Joseph G. A2 Nelson, Lewis S. A2 Howland, Mary Ann A2 Lewin, Neal A. A2 Smith, Silas W. A2 Goldfrank, Lewis R. A2 Hoffman, Robert S. SR Print(0) ID 1163004007 T1 Potassium Iodide T2 Goldfrank's Toxicologic Emergencies, 11e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259859618 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1163004007 RD 2024/04/23 AB Potassium iodide (KI) is the antidote to radioactive iodine that is released into the atmosphere after a nuclear incident. It is approved as a specific competitive inhibitor of thyroid uptake of radioiodine to reduce the risk of thyroid cancer in susceptible populations. The indications for its use are complex, and initiation and maintenance of therapy require great attention to the details of the circumstances of the exposure to limit harm that would result from either under treatment or overtreatment.