Overreaction to rattlesnake bite?

Some people might be allergic to rattlesnakes possibly

I don’t know what “antivenom” is. Some doctors speak French and call it “antivenin,” but I don’t like magic potions or quackish cures. I wouldn't know what bit me with what venom. If there are really ready-made antidotes lining the shelves in the hospital pharmacy or supply room, I could browse the aisles of a liquor store for the same thing, if it isn’t just a shot of tequila anyways, some hair-of-the-dog cure.

Hydration? Basic supportive care? Some antihistamine or anti-inflammatory possibly?

Man bit by rattlesnake in California, requires 54 rounds of antivenom
The CPCS reports an increase in snake encounters in 2026, with three fatalities reported so far.
Hospital runs out of anti-venom in desperate attempt to save life of father of three
A young dad bitten by a rattlesnake while visiting his parents in Oroville had to stay 12 nights in the ICU and needed 54 vials of anti-venom.

It could be a pre-existing condition of edema in the leg.

When I was bit for the first time by a rattlesnake, I felt a little bit sick the next day, possibly just as must from sunstroke or being dehydrated as from the snakebite itself, and I drank a whole case of bottled water and a little fresh fruit with it.

After that I don't even notice rattlesnake bites, and I'd let the snakes earn their keep by eating rats and mice, which tend to carry fleas and cause much worse health problems for humans.