LSD blotter paper. The psychedelic drug (or entheogen)<unk> <unk><unk>  (LSD) was first synthesized on November 16, 1938, by the Swiss chemist Albert Hofmann in the Sandoz (now Novartis) laboratories in Basel, Switzerland. It was not until five years later on April 19, 1943, that the psychedelic properties were found.
History of lysergic acid diethylamide
History of leprosy
History of Tay–Sachs disease
History of chemical warfare
History of neuraxial anesthesia
History of smallpox
History of polio
History of cardiopulmonary resuscitation