Psychoactive drug

A psychoactive drug or psychotropic substance is a chemical substance that acts primarily upon the central nervous system where it alters brain function, resulting in temporary changes in perception, mood, consciousness and behavior. These drugs may be used recreationally to purposefully alter one's consciousness, as entheogens for ritual or spiritual purposes, or therapeutically as medication.
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Noun
1. a drug that can produce mood changes and distorted perceptions
(synonym) mind-altering drug, consciousness-altering drug, psychoactive substance
(hypernym) drug
(hyponym) designer drug