If there is a "nuclear event," and you are down-wind, you need to take KIO3 or KI before the radioactive plume reaches you.
If you do not have KIO3 or KI at the time of the event, then it is most likely too late to take a thyroid blocker unless the authorities can reach you with the proper dose during fallout conditions.
Both KIO3 and KI are thyroid blockers and are used world-wide to help prevent radioactive damage to the thyroid in the event of a nuclear incident.
If a nuclear bomb detonates or a nuclear power plant is compromised or has a melt-down, then radioactive iodine is always released into the air and environment.
Protects the thyroid
Radioactive Iodine (I-131) can destroy the thyroid of humans and animals. Even small amounts of I-131 can cause cancer of the thyroid. By taking KIO3 the thyroid becomes saturated with “good iodine” and cannot absorb the “bad iodine” I-131.
Yes, animals or pets can take KIO3 too.
How much should I get?
Adults--Usually one bottle per Adult person is the recommendation.
Adults and children--If there are several small children in your care (under 12 years old at the time of the emergency) then, at least one bottle per two children will be enough.