LSD lysergic acid diethylamide, is a potent hallucinogenic drug. It is from lysergic acid, which is found in a fungus that grows on rye and other grains. LSD is a drug that is mind-altering. By interacting with the serotonin receptors in the brain, it is thought that LSD causes its characteristic hallucinogenic effects. Serotonin is a neurotrans