LSD(Lysergic acid diethylamide) is the most potent & strongest hallucinogen ever known to man. small Quantity of LSD(25 microgram or 0.000025 g) is enough to cause hallucinations. LSD was first synthesized by Albert Hofmann in 1938 from ergotamine, a chemical derived by Arthur Stoll from ergot, agrain fungus that typically grows on rye. It was synthesized by researchers seeking to create new medicine & first developed in lab of switzerland.
Hofmann discovered the psychedelic properties of LSD in 1943. It was introduced commercially in 1947 for various psychiatric uses, and it quickly became a therapeutic agent that appeared to show great promise. LSD is very potent, with 20–30 µg (micrograms) being the threshold dose.