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A '''psychoactive substance''' is defined as a chemical substance, other than a nutrient or essential dietary ingredient, that affects brain function to produce alterations in sensation, perception, mood, consciousness, cognition, and behavior.  
A '''psychoactive substance''' is a chemical substance, other than a nutrient or essential dietary ingredient, that affects brain function to produce alterations in sensation, perception, mood, consciousness, cognition, and behavior.  


Psychoactive substances are used for a number of purposes; for example, they can be taken recreationally for their novelty and [[euphoria|euphoric]] effects, as [[entheogens]] for ritual or spiritual purposes, or as tools for augmenting and studying the mind. Many psychoactive substances have demonstrable therapeutic utility and are used in routine medical practice (e.g. [[pain relief|anaesthetics]], analgesics, [[anxiety suppression|anxiolytics]], [[antidepressants]], etc.).
Psychoactive substances are used by humans for a variety of purposes. For example, they can be taken recreationally for their [[euphoria|euphoric]] effects and novelty, as [[entheogens]] for ritual or spiritual purposes, or as research tools for augmenting and studying the brain and mind. Many psychoactive substances have established therapeutic utility and are used in routine medical practice (e.g. [[pain relief|anaesthetics]], analgesics, [[anxiety suppression|anxiolytics]], [[antidepressants]], etc.).


The '''''psychoactive substance index''''' serves to catalog and provide relevant, accurate, and unbiased information for any and all psychoactive substances, with a special focus on those that can be used as tools for expanding consciousness. The individual articles detail not just the chemistry, pharmacology, toxicity and harm potential of each substance, but also its subjective effects. This is done by following a standardized system of definitions and terminologies that can be found in the [[subjective effects index]].
The '''''psychoactive substance index''''' exists to catalog and provide relevant, accurate, and unbiased information for any and all psychoactive substances, with special focus given to those that can be used as tools for expanding consciousness. The individual articles detail not just the history, chemistry, pharmacology, toxicity, and legality of each substance, but also its unique profile of subjective effects. This is done in accordance with a standardized system of definitions and terminologies found in the [[subjective effects index]].


'''Please see our [[summary index]] to view conveniently condensed versions of each article.'''
'''Please see our [[summary index]] to view conveniently condensed versions of each article.'''

Revision as of 00:02, 23 May 2019

A psychoactive substance is a chemical substance, other than a nutrient or essential dietary ingredient, that affects brain function to produce alterations in sensation, perception, mood, consciousness, cognition, and behavior.

Psychoactive substances are used by humans for a variety of purposes. For example, they can be taken recreationally for their euphoric effects and novelty, as entheogens for ritual or spiritual purposes, or as research tools for augmenting and studying the brain and mind. Many psychoactive substances have established therapeutic utility and are used in routine medical practice (e.g. anaesthetics, analgesics, anxiolytics, antidepressants, etc.).

The psychoactive substance index exists to catalog and provide relevant, accurate, and unbiased information for any and all psychoactive substances, with special focus given to those that can be used as tools for expanding consciousness. The individual articles detail not just the history, chemistry, pharmacology, toxicity, and legality of each substance, but also its unique profile of subjective effects. This is done in accordance with a standardized system of definitions and terminologies found in the subjective effects index.

Please see our summary index to view conveniently condensed versions of each article.