Recreational drug use is the use of a Drug (legal, controlled, or illegal) with the primary intention to alter the state of consciousness (through disruption of the CNS) in order to recreate positive emotions and feelings. The popular concept of this phenomena puts it closer to a social behaviour that many places around the world tolerate rather than to serious medical conditions such as self-medication. When a substance enters the user's body, it brings on a pleasurable intoxicating effect; in terms of psychoactive drugs, such as Cannabis or MDMA, this is often referred to as a "high".
Recreational drug use has been associated by some[by whom?] with various dispositions such as curiosity, boredom, low self-esteem, desire for risk, for meditation, desire to escape from or cope with difficulties, to relax, to increase energy, and to improve focus or concentration. Psychological disorders such as depression, trauma, social anxiety, and schizophrenia have also been claimed by some people[by whom?] to be promoters of drug use. Some users seek to encourage their socializing or an aphrodisiac effect.
Drugs commonly considered capable of recreational use include alcohol, Cannabis, nicotine, caffeine, and controlled substances within the scope of the United Nations' Single Convention on Narcotic Drugs and Convention on Psychotropic Substances. International and domestic law enforcement agencies are perpetually occupied with interdiction efforts against illegal drug use, manufacture, and distribution.[not specific enough to verify]