The post-World War II era was a tumultuous period in the world of psychiatry. Medical history has cast it as a clash between biology and psychoanalysis or as a time that lacked objectivism, that is until the introduction of psychotropic drugs such as chlorpromazine which triggered a change in our treatment of mental health as profound and far-reaching in its consequences as the war itself. In the early years of this psychopharmacological revolution, hallucinogens such as mescaline and LSD played as much of a role as other psychotropics. In fact, psychedelics constituted a scientific revolution in their own right, one that does not however fit the narrative of twentieth century scientific history.