Is venom poisonous?

If you have an ulcer, the venom will get into your bloodstream. I recall a story in a magazine about someone who used to sell curare and would downplay the value of a competitor's curare by swallowing some of it. The competitor gave him some fresh pineapple. When eaten, it allowed some of the curare to enter his bloodstream, killing him when he swallowed curare. That would be all it took to allow the same thing to happen with snake venom.

Venom is a specialised type of poison that has evolved for a specific purpose. It is actively injected via a bite or sting. ... Occasionally an animal can be both venomous and poisonous. The blue-ringed octopus, for example, is venomous when it bites with its beak but it is poisonous if it is swallowed.

Venom will cause tissue damage in mouth. It will be worse that dying from poison.  

i wouldnt drink it

Venom is a type of poison that is injected,  rattle snake venom will damage the stomach but its effects are greatest when injected into the blood stream.  Stomach acids will denature some of the toxic effects.