Snake venom is a complex mixture of many substances, such as proteins, toxins, enzymes, growth factors, activators and inhibitors with a wide spectrum of biological activities. This Book includes the study of interaction of venom with the phenothiazine drugs. The performance of drugs action in reducing toxicity is significant at specific concentration of drug in elapid and viperid venom. Mode of venom-drug interactions depends on minor structural changes of toxins. This Book is intended for a wide audience with the expectation that national health authorities, policy-makers, scholars, researchers and others committed to the advancement of public health in the World will make good use of it.