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FDA Approved Products

Note: the US Food and Drug Administration (FDA) has tested and approved iOSAT and only one other full-strength brand of potassium iodide (Thyro-block) for sale for radiation protection.

However, despite the obvious illegality, there are numerous companies selling unapproved tablets which have not passed FDA manufacturing requirements or demonstrations for safe and effective use in a radiation emergency. See FDA Orange Book list of Approved Drug Products

FDA Unapproved Products

  • Any tablets which contain potassium iodate (not iodide);
  • Tablets labeled as nutritional supplements;
  • Tablets containing ["microgram" not "milligram") amounts of potassium iodide;
  • Any product containing either less than ten, or more than 14, tablets;
  • Tablets sold under the name of:
    • Rad Block,
    • No-Rad,
    • Pro KI,
    • Rad Safe,
    • Rad Guard,
    • KI4U

For more information, please click this link or the FDA Verification tab for instructions on how to enter the FDA web site for a list of approved tablets.