Psilocybin modifies consciousness, perception, memories, thoughts, and feelings, with effects that can persist long after the substance's influence has ended.

“Psychedelics, such as psilocybin changed the way that we perceive the outside world and our internal world, our memories, our thoughts, our feelings, et cetera. Not just while one is under the influence of psilocybin, but it can also fundamentally change all of those things afterwards and for a very long period of time afterwards as well, which is one of the reasons why there's growing excitement about the application of psilocybin and other psychedelics for the treatment of various mental health issues, such as depression, alcohol abuse disorder, and addictions of various kinds, as well as things like OCD and eating disorders.”