Lysergic acid diethylamide (LSD) is a psychedelic drug that is known for its powerful hallucinogenic effects. It is one of the most potent hallucinogens known, and even a small dose can produce a profound experience.
LSD was first synthesized in 1938 by the Swiss chemist Albert Hofmann. Hofmann was researching the medicinal properties of ergot, a fungus that grows on rye. While working with ergot, Hofmann accidentally ingested a small amount of LSD and experienced its psychedelic effects.