Magic Mushrooms – South American
The effects of psilocybin mushrooms come from psilocybin and psilocin. When psilocybin is ingested, it is broken down to produce psilocin, which is responsible for the psychedelic effects. Psilocybin and psilocin create short-term increases intolerance of users, thus making it difficult to abuse them because the more often they are taken within a short period of time, the weaker the resultant effects are. Psilocybin mushrooms have not been known to cause physical or psychological dependence (addiction).
Using psilocybin is often associated with having negative physical and psychological consequences. The physical effects, tend to appear around 20 minutes of ingesting and will last approximately 6 hours. The effects include nausea, vomiting, muscle weakness, drowsiness, and lack of coordination. Nevertheless, no evidence has been shown that users will become physically dependent on psilocybin, however, tolerance for the drug may develop when it is ingested in a short period of time.
Shifts in visual perception include enhancement and contrasting of colours, strange light phenomena, increased visual acuity, surfaces that seem to ripple, shimmer, or breathe; complex open and closed eye visuals of form constants or images, objects that warp, morph, or change solid colours; a sense of melting into the environment, and trails behind moving objects.
Sounds seem to be heard with increased clarity; music, for example, can often take on a profound sense of cadence and depth. Some users experience synesthesia, for example, a visualization of colour upon hearing a particular sound.
As with other psychedelics, the experience is strongly dependent upon set and setting. A negative environment could contribute to a bad trip. A comfortable and familiar environment would set the stage for a pleasant experience. Psychedelics make experiences more intense, so if a person enters a trip in an anxious state of mind, they will likely experience heightened anxiety on their trip. Many users find it preferable to ingest the mushrooms with friends, people with whom they are familiar, or people who are familiar with it.
Psilocybin mushrooms are regulated or prohibited in many countries, often carrying severe legal penalties (for example, the US Psychotropic Substances Act, the UK Misuse of Drugs Act 1971 and Drugs Act 2005, and in Canada the Controlled Drugs and Substances Act).