of the protective measures that communities around nuclear power plants
might use in the case of a radiological emergency is potassium
iodine. But potassium iodine, often just called by its chemical symbol,
KI, can be confusing for the public -- exactly what does it do and when
should it be taken?
So here are some facts about KI:
is not an “anti radiation” pill. Potassium iodide is a salt, similar to
table salt. It is routinely added to table salt to make it "iodized."
Potassium iodide, if taken within the appropriate time and at the
appropriate dosage prevents the thyroid gland from taking in radioactive
iodine. This can help to reduce the risk from thyroid disease,
including cancer as a result of a severe reactor accident. KI doesn’t
protect the thyroid gland from any other radioactive element nor does it
protect the thyroid or the whole body from external exposure to
radiation. Its use is very limited.
comes as a tablet, either in 65 mg or 130 mg strengths. The usual dose
for a child is 65 mg, however, it is very important that the FDA dosing
guidelines be followed for small children as too much stable iodine can
also be harmful to them. The tablet can be easily crushed and mixed with liquid to make it easier to swallow.
is important that KI not be taken unless directed by appropriate state
or local authorities during the emergency and then, it should be taken
in accordance with those directions.
KI is NOT the same thing as table salt, and table salt should never be ingested as a substitute.
NRC provides KI – free of charge -- to states that have requested it
for their population within the 10-mile emergency planning zone of a
nuclear power plant. Some states have distributed KI to residents of a
plant’s emergency planning zone. In other states, KI is stockpiled and
would be distributed if and when it is necessary.