Emergency Preparedness
Potassium iodide (KI) fills the thyroid with stable iodine so it cannot absorb radioactive iodine released by a nuclear plant accident or fallout. The FDA approves it over the counter, and IOSAT is one of the approved brands. It protects only the thyroid, only against radioactive iodine, and only when taken at the right time, so take it only when public health or emergency officials tell you to. Children and pregnant women benefit most; follow the package dose by age. People with thyroid disease or an iodine allergy should ask a doctor first.
Why it's hereFDA-approved, over-the-counter KI that blocks radioactive iodine from the thyroid after a nuclear plant accident or fallout.
Troy's pick (FDA-approved OTC)| Rank | Product & source | Key note | Price | |
|---|---|---|---|---|
| ★ Top Pick | IOSAT Potassium Iodide 130 mg Tablets (Adult, 14 ct)Troy's pick (FDA-approved OTC) | FDA-approved, over-the-counter KI that blocks radioactive iodine from the thyroid after a nuclear plant accident or fallout. | ~$19.95Price checked Oct 20, 2026at anbex.com View product | |
| Runner-up | IOSAT Potassium Iodide 65 mg Tablets (Child dose)Troy's pick (FDA-approved OTC) | Half-strength tablets for children, from the same FDA-approved maker. | ~$19.95Price checked Oct 20, 2026at anbex.com View product | |
Only take potassium iodide when public health or emergency officials tell you to. It protects only the thyroid, only from radioactive iodine, and is not a general radiation shield. Follow the package dosing by age; ask a doctor first if you have thyroid disease or an iodine allergy.
