What is there to know reference: dosage, storage life, Capsules or Tablets, anything else you can think of adding.

This will tell you what you need to know:

https://www.health.ny.gov/envi.../docs/fact_sheet.pdf

Basically, what it does is saturate your thyroid with a non-radioactive iodine, so when there is a radiation disaster and you take your pill or drink it as a liquid there is no room in the thyroid for it to absorb radioactive iodine. Dose is 65mg for kids and 130mg for adults, taken every 24 hours. Like all other powdered medications, store in a cool dry place and it will last for years.

Personally, I've never felt it necessary to have but could see the value if I lived within 100 miles of a nuke plant.