Injury from a haemotoxic agent is often very painful and can cause permanent damage and in severe cases death.
Animal venoms contain enzymes and other proteins that are haemotoxic or neurotoxic or occasionally both (as in the Mojave rattlesnake, the Japanese mamushi,[1] and similar species).
In addition to killing the prey, part of the function of a haemotoxic venom for some animals is to aid digestion.
Typically, a mammalian prey will stop fleeing not because of death, but due to shock caused by the venomous bite.
In humans, symptoms include nausea, disorientation, and headache; these may be delayed for several hours.