It is possible for me to add the other anti-venom but i have my agruments against them,
As they only cure the venom and dont prevent, you need to drink 2-3 doses or more if you have a really slow kill. Due to this, high chance of running out of the potion and being poisoned going to the bank where it would not be a safe death.
I can look at ways of adding them but doubt id allow multiple kills with them due to the fact above and would make it withdraw (4) only.
Seems over kill but id rather have them be as safe as can be