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  1. LSD - Wikipedia

    Lysergic acid diethylamide, commonly known as LSD (from German Lysergsäurediethylamid) and by the nicknames acid and lucy, is a semisynthetic hallucinogenic drug derived from ergot, known for its …

  2. LSD: What to Know - WebMD

    Jun 10, 2025 · LSD (lysergic acid diethylamide), also called “acid,” is a type of synthetic and mind-altering substance (psychedelic). This belongs to a class of drugs called hallucinogens. When you …

  3. LSD - DEA.gov

    What is LSD? Lysergic acid diethylamide (LSD) is a potent hallucinogen that has a high potential for abuse and currently has no accepted medical use in treatment in the United States.

  4. LSD (Acid): Effects, Hazards & Extent of Use - Drugs.com

    LSD is synthetically made from lysergic acid, which is found in ergot, a fungus that grows on rye and other grains. It is so potent its doses tend to be in the microgram (mcg) range. It's effects, often …

  5. LSD | Definition, Psychological Effects, & Ergot Fungus | Britannica

    Mar 23, 2026 · LSD, potent synthetic hallucinogenic drug that can be derived from the ergot alkaloids of the fungus Claviceps purpurea. LSD is prepared by chemical synthesis in a laboratory.

  6. LSD - Alcohol and Drug Foundation

    Key facts about LSD, its effects, and risks. Learn about its appearance, common forms, and impact on mental health. Knowledge to stay safe.

  7. LSD: Effects, Risks, Tips, and More - Healthline

    May 27, 2020 · Lucy, acid, dots — whatever you want to call it, LSD is one of the most well-known hallucinogens. Here's a look at what it feels like, the risks involved, and how to stay safe if you …

  8. Lysergic acid diethylamide (LSD), commonly referred to as “acid,” is a synthetic hallucinogen. LSD is very potent; only microgram amounts are required to produce overt hallucinations. LSD has been …

  9. LSD - Meaning, Effects & Facts | HISTORY

    Jun 14, 2017 · LSD, or lysergic acid diethylamide, is a hallucinogenic drug that was first synthesized a Swiss scientist in the 1930s. During the Cold War, the CIA conducted clandestine experiments with …

  10. What Does LSD do to Your Brain? - American Addiction Centers

    Oct 25, 2024 · What is LSD? Lysergic acid diethylamide (LSD) is a popular psychedelic drug that alters the state of your mind in significant ways.