Mescaline is a psychedelic hallucinogen obtained from the small, spineless cactus Peyote (Lophophora williamsi), the San Pedro cactus, Peruvian torch cactus, and other mescaline-containing cacti. It is also found in certain members of the Fabaceae (bean family) and can be produced synthetically.
The top of the cactus above ground, or the crown, consists of disc-shaped buttons that are cut from the roots and dried. These buttons are generally chewed or soaked in water to produce an intoxicating tea. It can be consumed raw or dried but is extremely bitter. The hallucinogen may also be ground into powder for oral capsules, or smoked with marijuana and tobacco. The hallucinogenic dose is about 0.3 to 0.5 grams (equivalent to about 5 grams of dried peyote) and lasts about 12 hours. However, different doses can affect people in various ways, and doses extracted from plants can vary widely.
People have used hallucinogens for hundreds of year, mostly for religious rituals or ceremonies. Mescaline leads to rich visual hallucinations. From the earliest recorded time, peyote has been used by natives in northern Mexico and the southwestern United States as a part of traditional religious rites. It has an effect that is similar to LSD or psilocybin (magic mushrooms), other hallucinogenic drugs
Mescaline is used primarily as a recreational drug and is also used to supplement various types of meditation and psychedelic therapy. It is classified as a schedule I drug in the U.S., making it illegal in all forms