Psilocybin belongs to a group of substances called psychedelics or hallucinogens.
It can alter what someone sees, hears, feels, or understands as real. Mushrooms containing psilocybin are sometimes called magic mushrooms or shrooms. These names identify a broad category rather than guaranteeing potency, contents, or effects. Mushroom identification can also be mistaken, and some commercial products marketed as containing psilocybin have contained toxic chemicals linked with severe illness.
