LSD

D-lysergic acid diethylamide, commonly called acid, LSD, or LSD-25, is a powerful semisynthetic psychedelic drug. A typical dose of LSD is only 100 to 150 micrograms, a tiny amount roughly equal to one-tenth the weight of a grain of sand. Threshold effects can be felt with as little as 20 micrograms. LSD causes a powerful intensification and alteration of senses, feelings, memories, and self-awareness for 6 to 14 hours. In addition, LSD usually produces visual effects such as moving geometric patterns, "trails" behind moving objects, and brilliant colors. LSD usually does not produce hallucinations in the strict sense, but instead illusions and vivid daydream-like fantasies. At higher concentrations it can cause synaesthesia.

Notable people who have commented on the LSD experience

Many notable individuals have commented publicly on their experiences with LSD, both when it was legally available in the US and Europe for non-medical uses as well as for psychiatric treatment in the 1950s and 60s, and later illegally, through its continued use for philosophic, artistic, therapeutic, spiritual, or recreational purposes.

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