https://www.cdc.gov/nceh/radiation/emergencies/ki.htm Good morning all, There's been some direct - and indirect - references to potassium iodide. I'm posting this here and not at the medical section becaue my point is - safety -. My experience with this chemical is that ALL physicians tell me not to self-administer. At the above cdc link at end of article at "Adults" (citing over 40 years old), some clear info is presented. I recommend you obtain professional advice prior to need because you might be alone in a wilderness environment. A fallout shelter involves this chemical because some occupants could be in the eligible categories.