Pode ser uma imprecisão histórica, mas encontrei informações na página da Wikipedia sobre "História do Tabagismo" que a maconha e algumas outras coisas foram usadas na Grécia Antiga.
In Ancient Greece, smoke was used as healing practice and the Oracle of Delphi made prophecies while intoxicated by inhaling natural gases from a natural bore hole. The Greek historian Herodotos also wrote that the Scythians used cannabis for ritual mourning purposes and, to some degree, pleasure. He describes how Scythians burned hemp seed (IV, 75)