I frequently talk to people about what shot be in their bug out gear, and the list of items (guns&ammo, food, water, etc..) that you'd want if civilization broke down (end of days) eather due to natural or manmade disasters. I'm always amazed that in their medical kit that they do not list any antibiotics. After a disaster the one thing that will most likely kill you is an infection of some sort. Although emergency medical supplies are important. The three antibiotics that come to mind for me personnaly are probably Zithromax, Cipro, and Levaquin. Just a thought.
PS: Don't forget Lot's and Lot's of ammo to protect the antibiotics.