Party drug

Recreational drug use is the use of a psychoactive drug to induce an altered state of consciousness for pleasure, by modifying the perceptions, feelings, and emotions of the user. When a psychoactive drug enters the user's body, it induces an intoxicating effect. Generally, recreational drugs are in three categories: depressants (drugs that induce a feeling of relaxation and calm); stimulants (drugs that induce a sense of energy and alertness); and hallucinogens (drugs that induce perceptual distortions such as hallucination). In popular practice, recreational drug use generally is a tolerated social behaviour, rather than perceived as the serious medical condition of self-medication.

Recreational drugs include alcohol (as found in beer, wine, and distilled spirits); cannabis and hashish; nicotine (tobacco); caffeine (coffee and black tea); and the controlled substances listed as illegal drugs in the Single Convention on Narcotic Drugs (1961) and the Convention on Psychotropic Substances (1971) of the United Nations. What controlled substances are considered illegal drugs varies by country, but usually includes methamphetamines, heroin, cocaine, and club drugs. In 2009, it was estimated that about 3% to 6% of people aged 15 to 65 had used illegal drugs at least once (149 to 270 million).

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