I Googled Insulin + shelf life and get discussion forums about it but nothing definitive. Answers range from 30 days to 2 years, that’s a rather wide range.
I don’t use insulin but my wife does and the doc prescribes it for 30 days at a time.
I know money is not that important when it comes to things like this but I have no idea what it even costs as all we pay is a $5 co pay and I know for a fact that all our insurer will pay for is 30 days at a time.
The money part wouldn’t stop me but I seriously doubt that the doctor could be talked into much more that a 60 or 90 day supply. I am going to talk to him, he probably knows more about the realistic shelf life than I’ve been able to find on the internet anyway.
We have canned food stored and some dried food and at any given time about a dozen or so cases of bottled water in and near our garage refrigerator, we drink a lot of water and rotate the stock, in addition we are also pretty well stocked up on non perishables. I’d like to do more but there’s a practical matter of limited space.
I’ve never owned more than two guns and a moderate supply of ammo, I’m currently the owner of only 1 gun, a .357, 7 shot revolver I keep at bed side.
Side story - a couple of years back when an ice storm knocked out electricity at my mother’s house in Missouri, she was without running water for over a week, rural like area and electric pump. She had gallons and gallons of water stored in the shed, she had labeled them with the date that she stored it, some of it (in milk jugs) was dated in the late 80’s.
My brothers and sisters and I were quick to caution her not to drink it but she was way ahead of us, she used that water for flushing the toilet. She had plenty of sealed bottled water for drinking.
Over at survivalblog.com there are some articles on herbal substitutes and making your own insulin. Some of the articles and links there are from MDs. Not an easy process but something to consider.
Other answers are a propane powered fridge to keep it cool.
Re: Insulin
If you have not already read the post apocalyptic novel “One Second After” by William Forstchen you might find it interesting.
Breifly, it is the story of a modern day small town and its residents in the aftermath of an EMP attack. The protagonist has an insulin dependent daughter and has to cope with the limited supply of insulin as well as the preservation of their small personal supply in a world without electricity and refrigeration.
It is a good read and very thought provoking.