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 …

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 …

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,...

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.

Nov 25, 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.

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 …

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 …