Believe it or not I was just chatting with my dad today and asked him if he still injects himself with snake venom. The answer is yes but maybe not. Apparently he got a couple of vials of freeze dried venom from a vet like 12 years ago but then the vet cut him off when he found out what it was being used for and he hasn't found a new dealer.
He thinks that it might be losing its potency over the years and they lost power a couple of times (he keeps it in the freezer) so it hasn't been frozen the whole time. It's a once a month injection right into the thigh muscles.