in the decades after Pope Innocent’s fiat against witchcraft, cannabis, opium, belladonna, and the rest were simply transferred from the realm of sorcery to medicine, thanks largely to the work of a sixteenth-century Swiss alchemist and physician named Paracelsus. Sometimes called the “Father of Medicine,” Paracelsus established a legitimate pharmacology largely on the basis of the ingredients found in flying ointments. (Among his many accomplishments was the invention of laudanum, the tincture of opium that was perhaps the most important drug in the pharmacopoeia until the twentieth century.)
