I have a fairly extensive first aid kit, but what I don’t have in it and would like to have is some kind of antibiotic pill or something like that to fight off infection if needed. I have no source for them; don’t want to buy then illegally. I was wondering if any one has an idea how to address this?

My dad was a first aid captain on the local fire department for 40-years, and my brother now has the exact same job, but neither of them can help. My brother does not have access to that type of thing, lots of other useful things, but not pills.