The peyote cactus, scientifically known as Lophophora williamsii, is a small, spineless cactus native to the southwestern United States and northern Mexico. It is well-known for its psychoactive properties, primarily due to the presence of the compound mescaline. Traditionally, peyote has been used in various indigenous cultures for spiritual and medicinal purposes, often during religious ceremonies. When consumed, peyote can induce altered states of consciousness, including visual and auditory hallucinations, changes in perception, and emotional experiences. The effects typically last for several hours, and the cactus is often chewed or brewed into a tea. Due to its psychoactive nature, peyote is classified as a controlled substance in many countries.