Chicago, Illinois – A little-known pill could play a critical role in protecting thousands of Illinois residents if a radiation emergency unfolds near one of the state’s nuclear facilities.
According to the Illinois Emergency Management Agency, potassium iodide, or KI, is available for free to people living within 10 miles of plants in Braidwood, Byron, Clinton, Dresden, LaSalle and the Quad Cities. The tablets are designed to protect the thyroid from radioactive iodine exposure, one of the most immediate health risks during a nuclear incident.
KI works by saturating the thyroid with stable iodine, blocking radioactive iodine from being absorbed. That action can significantly reduce the risk of thyroid cancer, especially in children and pregnant individuals. However, it does not protect other parts of the body, and it cannot reverse damage once exposure has occurred.
Communities including Joliet, Rockford, Ottawa and Dixon are among those closest to these emergency planning zones, where distribution sites like Walgreens and CVS provide pre-event access to the medication.
Officials stress KI should only be taken when directed by public health authorities. Evacuation or sheltering in place remains the primary protection strategy, with KI serving as a secondary layer of defense.
Radioactive iodine is also used safely in medical settings, including targeted treatments for thyroid cancer and hyperthyroidism, highlighting its controlled benefits when properly administered.
Residents are urged to review local emergency plans now, as guidance and alerts could be issued rapidly during any incident.
