Psychedelic drugs are psychoactive drugs whose primary action is to enhance or amplify the thought processes of the brain. The term is derived from Greek ψυχη (psyche, "mind") and δηλειν (delein, "to manifest"), or δηλος (delos, "beautiful").
Many Psychedelic drugs are thought to disable filters which block or suppress signals related to mundane functions from reaching the conscious mind. These signals are presumed to originate in several other functions of the brain, including but not limited to the senses, emotions, memories and the unconscious (or subconscious) mind. This effect is sometimes referred to as mind expanding, or consciousness expanding as your conscious mind becomes aware of (or sometimes assaulted by) things normally inaccessible to it. At high levels this can overwhelm the sense of self and can result in a dissociative state.
The best definition of what is considered a classic or true psychedelic is the following -- “a psychedelic drug is one which, without causing physical addiction, craving, major physiological disturbances, delirium, disorientation, or amnesia, more or less reliably produces thought, mood, and perceptual changes otherwise rarely experienced except in dreams, contemplative and religious exaltation, flashes of vivid involuntary memory and acute psychoses”. (Grinspoon and Bakalar * p.9). Over the decades, the term has been contaminated to include far more substances than originally intended. Many pharmacologists define psychedelic drugs as chemicals which have an LSD or mescaline like action on certain serotonin receptors. This essentially means tryptamines and phenethylamines, as no psychedelics from other chemical families have been discovered, with the possible exception of piperazines. Many people have applied the term psychedelic to other drugs including cannabis, dissociative arylcyclohexylamines such as PCP and ketamine, tropane deliriants such as atropine, or novel psychoactives such as Amanita muscaria and Salvia divinorum. More properly, these should be grouped with psychedelics under the category of entheogens, a term which describes the way a drug is used rather than its pharmacological properties.
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HPPDonline.com - Information and message boards for people with Hallucinogen Persisting Perception Disorder (flashbacks).
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