Dreamsnake is a 1978 science fiction novel by American writer Vonda N. McIntyre. It is an expansion of McIntyre's 1973 novelette "Of Mist, and Grass, and Sand", for which she won her first Nebula Award. The story is set on Earth in the aftermath of a nuclear holocaust. The central character, Snake, is a healer who uses genetically modified serpents to cure sickness; one of these is the titular "dreamsnake", an alien serpent whose venom gives dying people pleasant dreams. The novel follows Snake as she seeks to replace her dreamsnake after its death.