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Article: Addiction and Habituation
- Article from:
- Encyclopedia of Public Health
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CopyrightCOPYRIGHT 2002 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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ADDICTION AND HABITUATION
Although there is no definition of "addiction" that is universally accepted, in general, addiction refers to a physiological and psychological dependency on a drug. While some drugs of abuse induce physiological addiction, others do not. Alternatively, some drugs that are physiologically addictive generally are not abused (e.g., caffeine). Tolerance to drug effects, and withdrawal symptoms upon abrupt cessation of use, which develop over time, are characteristic features of physiological addiction. "Habituation" is the term used to refer to psychological dependence on a drug. Some drugs of abuse are highly rewarding because of their influence on reinforcing ...