There are two categories of snake venom neurotoxic and haemotoxic. Neurotoxins are typical of elapids (cobra, krait) and sea snakes. They cause death by paralysis of respiratory muscles and asphyxiation. Haemotoxins are typical of vipers. They cause tissue destruction and wide spread haemorrhage. The best cure for snake bite is an antivenom serum or antivenin, which is injected into the body of victim, to counteract snake venom.