Snake venom is highly modified saliva[citation needed] that is produced by special glands of certain species of snakes. The gland which secretes the zootoxin is a modification of the parotid salivary gland of other vertebrates, and is usually situated on each side of the head below and behind the eye, invested in a muscular sheath. It is provided with a large alveoli in which the venom is stored before being conveyed by a duct to the base of the channelled or tubular fang through which it is ejected. Snake venom is a combination of many different proteins and enzymes. Many of these proteins are harmless to humans, but some are toxins.
Note that snake venoms are generally not dangerous when ingested, and are therefore not technically poisons.[citation needed]
So snake venom is not a poison, but some snakes have toxins that could be harmful when ingested.
Anyway, I figure I can supplement my 3 tangenty posts with some fucked up shit!