Which term refers to the self-administration of a drug in chronically excessive quantities, resulting in a psychological or physical dependence?

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Drug abuse refers to the self-administration of a drug in chronically excessive quantities, which can result in psychological or physical dependence. Drug overuse and drug self-use are not commonly used terms, and drug tolerance refers to the body's reduced response to a drug after continued use, rather than the act of self-administering excessive amounts.

Which Term Refers to the Self-Administration of a Drug in Chronically