Psilocybin Psilocybin, the psychoactive compound found in "magic mushrooms," continues to be employed for ceremonial and medicinal functions between Indigenous peoples for millennia. Psilocybin has a hallucinogenic effect on the brain. Drug regulations penalize each actual and constructive possession of medication. Precise possession usually refers to physical possession, for instance https://www.tumblr.com/lsdvibes/757469329295048704/historyoflsd?source=share