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A recreational drug is used without medical justification for its psychoactive effects, often with the belief that occasional use is not habit-forming or addictive. Examples include cocaine, marijuana, and methamphetamine. Drug abuse involves the excessive, maladaptive, or addictive use of drugs for nonmedical purposes, leading to social, psychological, and physical problems.12

Abused substances encompass a wide range, including psychotropic agents that alter mood, feeling, and perception, such as opiates, hallucinogens, barbiturates, cocaine, amphetamines, cannabis, and alcohol. The nonmedical consumption of these drugs is often illegal, though some, like alcohol, are legally available despite their abuse potential. Concerns surrounding drug use include dependence, tolerance, and various health and social hazards.2

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