In 1804, a 19-year-old Oxford University undergraduate named Thomas De Quincey swallowed a prescribed dose of opium to relieve excruciating rheumatic pain. He was never the same.
“Oh! Heavens!” he wrote of the experience in the first modern drug memoir, “Confessions of an English Opium-Eater,” published in 1821. “What an upheaving, from its lowest depths, of the inner spirit! What an apocalypse of the world within me!”