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Psychoactive drug

A psychoactive drug or psychotropic substance is a chemical that alters brain function, resulting in temporary changes in perception, mood, consciousness, or behaviour. Extreme use can have permanent affects on the brain. Such drugs are often used for recreational and spiritual purposes, as well as in medicine, especially for treating neurological and psychological illnesses.

Common psychoactive drugs

Note: This overview groups together drugs with different effects and modes of action. Several have properties of many categories.

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Last updated: 10-24-2004 05:10:45