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The drugs used by religious communities for their hallucinogenic effects were adopted for explicit and implicit religious functions and purposes. The drugs were and are reported to enhance religious experience through visions and a distortion of the sensory perception (like in dreams in a state of sleep).
- Cannabis sativa, which grows all over the world except in very cold climates, is used in religious practices in Indian and African communities
- Certain Hallucinogenic Mushrooms are used by cultists among the Indians in Latin America, especially in the state of Oaxaca in southern Mexico. The chief species is Psilocybe mexicana, of which the active principles are psilocybin and its derivative psilocin, in their chemical composition and activity not unlike LSD (D-lysergic acid diethylamide); the latter is synthesised from the alkaloids (principally ergotamine and ergonovine) that are constituents of ergot, a growth present in grasses affected by the disease also called ergot. Amanita muscaria (fly agaric) is another mushroom having hallucinogenic properties that has not been thoroughly studied. It may be extremely important, since it may have been the natural source of the ritual soma drink of the ancient Hindus and the comparable haoma used by the Zoroastrians. Fly agaric is mildly toxic at high dosages and is said to have, in addition to its hallucinogenic properties, the ability to increase strength and endurance. It is said also to be a soporific.
- Peyote used by some Indian communities of Mexico. The chief active principle of peyote is an alkaloid called mescaline. Like psilocin and psilocybin, mescaline is reputed to produce visions and other evidences of a mystical nature. Despite claims of missionaries and some government agents that peyote – from the Nahuatl word peyotl ("divine messenger") – is a degenerative and dangerous drug, there appears to be no evidence of this among the members of the Native American Church, a North American Indian cult that uses peyote in its chief religious ceremony. Peyote, like most other hallucinogenic drugs, is not considered to be addictive and, far from being a destructive influence, is reputed by cultists and some observers to promote morality and ethical behaviour among the Indians who use it ritually.
- Ayahuasca, caapi, or yajé, is produced from the stem bark of the vines Banisteriopsis caapi and B. inebrians. Indians who use it claim that its virtues include healing powers and the power to induce clairvoyance, among others. This drink has been certified by investigators to produce remarkable effects, often involving the sensation of flying. The effects are thought to be attributable to the action of harmine, a very stable indole that is the active principle in the plant. While the Indians themselves attribute the properties of the drink Ayahuasca to B. caapi, this is not the common scientific view; the MAOIs present in the B. caapi instead allow the extremely psychedelic ingredients in other plants added to the brew, noticeably plants containing DMT, to be activated and produce an intense experience.
- Kava drink, prepared from the roots of Piper methysticum, a species of pepper, and seemingly more of a hypnotic-narcotic than a hallucinogen, is used both socially and ritually in the South Pacific, especially in Polynesia.
- Iboga, or ibogaine, a powerful stimulant and hallucinogen derived from the root of the African shrub Tabernanthe iboga (and, like psilocybin and harmine, a chemical relative of LSD) is used by the Bwiti cult in Central Africa.
- Coca, source of cocaine, has had both ritual and social use chiefly in Peru.
- Datura, one species of which is the jimsonweed, is used by native peoples in North and South America; the active principle, however, is highly toxic and dangerous. A drink prepared from the shrub Mimosa hostilis, which is said to produce glorious visions in warriors before battle, is used ritually in the ajuca ceremony of the Jurema cult in eastern Brazil.