I think this is one of those things that is going to be purely situational. I know for a fact I have heavy expenses coming if my wife cannot get her meds from the house for some reason. However if I am alone and trying to get to my family, I won't need nearly as much. (Unless I am in Siberia trying to get back to Texas!!)

I keep a regular cash stash and a medicine cash stash due to the expense of her scripts.