Here's some food for thought:
http://blogs.montrealgazette.com/201...es-apocalypse/
Oddly enough I was thinking about this when I watched this week's episode: what would I do if there was a zombie apocalypse (or similar)? Would I have to break into every pharmacy, steal all the T I can and lug it around, protecting it (and necessary needles)? A hysto would allow for a stretched out usage and certainly natural methods could help but..