Ianjbs,

It all depends on where you live and how paranoid you are. I live in Phoenix. We are not on the top list of cities the terrorists want to nuke. I do have a box at home and some pills at work.

There are several brands. One box costs about $12.00. It is good for one person for about a week. You should be able to pick up a box at your local chain pharmacy. You will have to look around. Having a picture of the product helps.