Problems of therapeutics in veterinary medicine are much more complex than those of human medicine. The veterinarian deals with various species of animals, each with its peculiar diseases and varied reactions to standard drugs. Plans of medication are often difficult problems, especially where a considerable number or where large or refractory animals are involved. Yet, veterinary therapeutics has made tremendous progress within very recent years both as to methods and products, the latter differing but very little from those of general application in human medicine.