What is the annual cost of that medicine to carry, and how much trouble, does it need to be kept cool?
Rattlesnake bite is VERY expensive.
The serum costs like $5,000 for a pop and you need on average about 20 of them.
So an average rattlesnake bite set you back like $100,000 or so.
You can buy cheap kit on Amazon, but it does not really work!
Do NOT rely on those!