Iosat Potassium Iodide tablets


Iosat is the only FDA-approved, full strength potassium iodide tablet (130 mg) that may be legally sold in the US. It blocks the thyroid’s absorption of cancer-causing radioactive iodine released from nuclear reactor emergencies such as Fukushima or nuclear weapon fallout. Half-strength (65 mg) ThyroSafe Potassium Iodide tablets are available here

  • May 2028 exp date
  • FDA approved in 1982
  • 14 130 mg tablets per pack (small “baby-aspirin” sized)
  • Individually foil sealed for single unit storage and dosing
  • 14 day protection for adult (1 tablet each day of exposure)
  • 28+ day protection for child (double-scored for exact dosing)
  • No prescription required – OTC