I just got a email alert from my doctor recommending consumption potassium iodide daily for the next 30 days. The first plume of radiation from the Fukushima power plant is expected to reach the US west coast on next Monday, March 21. The recommendation is 130 mg per day for adults, down to 15 mg per day for newborns. It should be taken for at least a week, and perhaps out to 6 weeks. The best protection occurs when consumed starting 4 days before exposure. Retail supplies of potassium iodide are certainly going to be in short supply soon, if not already. So even if you don't believe it's necessary to consume it yet, I'd still recommend obtaining a supply in case the authorities actually call for it. A website dedicated to the issue is at Potassium Iodide Pills Anti-Radiation Pill & Nuclear Emergency FAQ. Radiation Detectors, Meters, Geiger Counters & Potassium Iodine Iodate pills . If you want to buy their tablets, you're already too late. They are not accepting new orders at this time.