Psilocybin physiological effects

Hasler F, Grimberg U, Benz MA, Huber T, Vollenweider FX. Acute psychological and physiological effects of psilocybin in healthy humans a double-blind, placebo-controlled dose-effect study. Psychopharmacology (Berl) 2004 172(2) 145-56. 

The primary effects of the entheogenic psilocybin mushrooms on human physiology are due to several tryptamine alkaloids synthesized and accumulated by these fungi. The categorical name tryptamine alkaloids (or tryptamines ) designates molecules whose molecular structure contains 3-(2-aminoethyl)indole as a central feature (fig. 1). 

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