Vampire venom is the liquid a vampire secretes from it's mouth when they become thirsty and are about to strike. The venom replaces all of the usual chemical processes in the bodies of the vampires. This is why vampires do not have to eat, drink, sleep, breathe, age, give birth and can't change body shape, as they are seen as "frozen in time".
 Uses of vampire venom
- Hightens thirst and adrenaline (as seen in Midnight Sun).
- Replaces the human chemical processes.
- Used to transform humans into vampires.