Owsley's acids, also known as lysergic acid diethylamide (LSD), are a hallucinogenic drug that gained popularity in the 1960s. There are many synonyms for LSD, including acid, blotter acid, tabs, doses, hits, microdots, and sugar cubes. Other slang terms for LSD include Lucy in the Sky with Diamonds, Alice, and White Light. These terms are often used in reference to the drug's psychedelic effects on the user's perception and consciousness, which have been described as creating a sense of heightened awareness, mystical experiences, and vivid hallucinations. LSD is a controlled substance and illegal to possess or distribute in most countries.