LSD, or Lysergic Acid Diethylamide, is a potent psychoactive substance, famous for inducing intense hallucinations and altering consciousness. Synthesized by Swiss chemist Albert Hofmann in 1938, its effects can last up to 12 hours from very small doses. LSD is notable for its psychological impact, influencing sensory experiences and emotional states. Despite its recreational reputation, recent studies investigate its potential in treating mental health disorders like depression and PTSD.