Potassium iodide is the only FDA-approved medication available to treat contamination with radioactive iodine. There are FDA-approved products available that increase the rate of elimination of other radioactive elements. They include:
Calcium-DTPA and Zinc DTPA, Hameln Pharmaceuticals. Approved to treat known or suspected internal contamination with plutonium, americium, or curium to increase the rates of elimination.
Radiogardase (Prussian blue insoluble capsules), HEYL Chemisch-Pharmazeutische Fabrik GmbH & Co. KG. Approved to treat known or suspected internal contamination with radioactive cesium and/or radioactive or non-radioactive thallium to increase their rates of elimination.
