Lysergic Acid Diethylamide, commonly known as LSD, is a powerful hallucinogenic drug that alters perception, mood, and cognitive processes. It was first synthesized in 1938 by Albert Hofmann, a Swiss chemist, and is derived from ergot, a fungus that grows on rye. LSD is known for its ability to induce vivid visual and auditory hallucinations, as well as profound changes in thought patterns. Typically consumed in small doses, LSD is often found on blotter paper or in liquid form. The effects can last up to 12 hours, leading to experiences often referred to as a "trip." While some users report positive experiences, others may encounter anxiety or paranoia, highlighting the drug's unpredictable nature.