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Classical psychedelics (5-HT2A receptor agonists)[ edit]
This class of psychedelics includes the classical hallucinogens, including the lysergamides like LSD and LSA, tryptamines like psilocybin and DMT, and phenethylamines like mescaline and 2C-B. Many of these psychedelics cause remarkably similar effects, despite their different chemical structure. However, many users report that the three families have subjectively different qualities in the "feel" of the experience, which are difficult to describe. At lower doses, these include sensory alterations, such as the warping of surfaces, shape suggestibility, and color variations. Users often report intense colors that they have not previously experienced, and repetitive geometric shapes are common. Higher doses often cause intense and fundamental alterations of sensory perception, such as synesthesia or the experience of additional spatial or temporal dimensions. Some compounds, such as 2C-B, have extremely tight "dose curves", meaning the difference in dose between a non-event and an overwhelming disconnection from reality can be very slight.[citation needed] There can be very substantial differences between the drugs, however. For instance, 5-MeO-DMT rarely produces the visual effects typical of other psychedelics and ibogaine (a "complex tryptamine") is also an NMDA receptor antagonist and κ-opioid receptor agonist in addition to being an agonist for the 5-HT2A, resulting in dissociative effects as well (see dissociatives below). Research published in journal Cell Reports states that psychedelic drugs promote neural plasticity in rats and flies.

Empathogen-entactogens (serotonin releasers)[ edit]
The empathogen-entactogens are phenethylamines of the MDxx class such as MDMA, MDEA, and MDA. Their effects are characterized by feelings of openness, euphoria, empathy, love, heightened self-awareness, and by mild audio and visual distortions (an overall enhancement of sensory experience is often reported). Their adoption by the rave subculture is probably due to the enhancement of the overall social and musical experience. MDA is atypical to this experience, often causing hallucinations and psychedelic effects in equal profundity to the chemicals in the 5-HT2A agonist category, but with substantially less mental involvement, and is both a serotonin releaser and 5-HT2A receptor agonist.[citation needed]

 Cannabinergics  [ edit]

Dissociatives [ edit]
Certain dissociative drugs acting via NMDA antagonism are known to produce what some might consider psychedelic effects. The main differences between dissociative psychedelics and serotonergic hallucinogens are that the dissociatives cause more intense derealization and depersonalization. For example, ketamine produces sensations of being disconnected from one's body and that the surrounding environment is unreal, as well as perceptual alterations seen with other psychedelics.

 Deliriants   [ edit]- 

Other[ edit]
Salvia divinorum is a dissociative that is sometimes classified as an atypical psychedelic. The active molecule in the plant, salvinorin A, is a kappa opioid receptor agonist, working on a part of the brain that deals with pain. Activation of this receptor is also linked to the dysphoria sometimes experienced by users of opioids either therapeutically or recreationally. An unusual feature of S. divinorum is its high potency (dosage is in the microgram range) and extremely disorienting effects, which often include "entity contact", complete loss of reality-perception and user's experiencing their consciousness as being housed in different objects e.g. a pane of glass or a pencil.

Psychedelic's Potential in Creating an Ecological Society

- Peter Brace found psychedelics such as LSD to have the potential to allow humanity to connect on the same vibration with each other and nature. He believes that the altered state of consciousness will be efficient in connecting humanity because of its ability to be persuasive through out time and across human cultural.

Additionally, ibotenic acid and muscimol, the active constituents of Amanita muscaria, may be regarded as psychedelic, dissociative or deliriant.[citation needed]