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Some supposed nootropic substances are compounds and analogues of choline, a precursor of acetylcholine (a neurotransmitter) and phosphatidylcholine (a structural component of cell membranes). Alpha-GPC – L-alpha glycerylphosphorylcholine has been studied only in the context of cognitive performance alongside other substances such as caffeine.
No clear connection has been made between psychedelic drugs and organic brain damage. However, hallucinogen persisting perception disorder (HPPD) is a diagnosed condition wherein certain visual effects of drugs persist for a long time, sometimes permanently, [61] although the underlying cause and pathology remains unclear. [62]
A psychoactive drug, mind-altering drug, or consciousness-altering drug is a chemical substance that changes brain function and results in alterations in perception, mood, consciousness, cognition, or behavior. [1] The term psychotropic drug is often used interchangeably, while some sources present narrower definitions.
The following is a list of psychedelic drugs of various chemical classes, including both naturally occurring and synthetic compounds. Serotonergic psychedelics are usually considered the "classical" psychedelics [dubious – discuss], whereas the other classes are often seen as having only secondary psychedelic properties; nonetheless all of the compounds listed here are considered ...
Chart of drug dependence potential and relationship between use and lethal dose [33] Chart of relative harmfulness of some psychoactive substances [32] Drug harmfulness is defined as the degree to which a psychoactive drug has the potential to cause harm to the user and is measured in several ways, such as by addictiveness and the potential for ...
The drug or other substance has a currently accepted medical use in treatment in the United States or a currently accepted medical use with severe restrictions. Abuse of the drug or other substances may lead to severe psychological or physical dependence. The complete list of Schedule II substances is as follows.
Psychedelic drugs are useful for exploring the subconscious because a conscious sliver of the adult ego usually remains active during the experience. [ 23 ] : 196 Patients remain intellectually alert throughout the process and remember their experiences vividly afterward.
Mental substance, according to the idea held by dualists and idealists, is a non-physical substance of which minds are composed. This substance is often referred to as consciousness . This is opposed to the materialists , who hold that what we normally think of as mental substance is ultimately physical matter (i.e., brains).