Psychedelic or hallucinogenic drugs such as lysergic acid diethylamide (LSD), 3, 4, 5-trimethoxy-β-phenethylamine (mescaline), psilocybin, 3, 4-methylenedioxymethamph-etamine (MDMA), N, N-dimethyltrypta-mine (DMT) and their relations occur in abundance throughout the natural world, and have been used by humankind for thousands of years.
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Ben Sessa (2005) studied this question.
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