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  1. LSD - Wikipedia

    LSD is extremely potent, with noticeable effects at doses as low as 20 micrograms and is sometimes taken in much smaller amounts for microdosing. Despite widespread use, no fatal human overdoses …

  2. 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 …

  3. LSD | Definition, Psychological Effects, & Ergot Fungus ...

    Dec 31, 2025 · 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.

  4. 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.

  5. LSD: What to Know - WebMD

    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 take LSD,...

  6. Substance use - LSD: MedlinePlus Medical Encyclopedia

    LSD affects the action of a brain chemical called serotonin. Serotonin helps control behavior, mood, the senses, and thinking. LSD is in a class of drugs called hallucinogens. These are substances that …

  7. LSD Fast Facts - United States Department of Justice

    LSD (lysergic acid diethylamide) is a synthetic (man-made) drug that has been abused for its hallucinogenic properties since the 1960s. If consumed in a sufficiently large dose, LSD produces …

  8. LSD: The Bad and Potentially Good Sides - Psychology Today

    Sep 9, 2025 · Unsupervised use of hallucinogens like LSD can pose significant risks. However, LSD is being tested and is showing promise for treating generalized anxiety disorder (GAD)anxiety.

  9. LSD (Lysergic acid diethylamide): Origins, types & effects

    Oct 24, 2022 · LSD, commonly known as acid, is the most potent hallucinogen yet discovered: a drug that induces lengthy psychedelic trips with visual disturbances, sensory distortion, hallucinations, and …

  10. LSD - Alcohol and Drug Foundation

    What is LSD? LSD (lysergic acid diethylamide) is a psychedelic drug, which means it can affect all senses, altering a person’s thinking, sense of time and emotions. Psychedelics can cause a person …