Psilocybin mushrooms are fungi that contain the psychoactive compounds psilocybin and psilocin. There are multiple colloquial terms for psilocybin mushrooms, the most common being shrooms and magic mushrooms. Biological genera containing psilocybin mushrooms include Agrocybe, Conocybe, Copelandia, Galerina, Gerronema, Gymnopilus, Hypholoma, Inocybe, Mycena, Panaeolus, Pluteus, and Psilocybe. There are approximately 190 species of psilocybin mushrooms and most of them fall in the genus Psilocybe. Psilocybin mushrooms were used in ancient times, and were depicted in rock paintings. Many native peoples have used mushrooms for religious purposes, rituals and healing. In modern day society they are often used to evoke a "high", which is sometimes described as spiritual experience and is often euphoric in nature. Sometimes however, the disorientation of psilocybin and psilocin's psychedelic effects may bring on anxiety such as panic attacks, depression and paranoid delusions.
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