Compulsive, excessive, and self-damaging use of habit forming drugs or substances, leading to addiction ordependence, serious physiological injury (such as damageto kidneys, liver, heart) and/or psychological harm (such asdysfunctional behavior patterns, hallucinations, memoryloss), or death. Also called substance abuse.
Drug
1. Natural or synthetic substance which (when taken into a living body) affects its functioning or structure, and is used in the diagnosis, mitigation, treatment, or prevention of a disease or relief of discomfort. Also called legal drug or medicine. A legal or medicinal drug (such as amphetamines), however, can be harmful and addictive if misused.
2. Habit forming stimulant or narcotic substance (such asalcohol, cannabis, nicotine, or a derivative of cocoa or poppy) which produces a state of arousal, contentment, or euphoria. Continued or excessive use (called drug abuse orsubstance abuse) of such substances causes addiction ordependence. Thereafter any attempt to discontinue their use results in specific reactions (called withdrawalsymptoms) such as sweating, vomiting, and tremors which cease when the use is resumed. Also called illegal drugwhere its production and/or use is prohibited.
Whether a substance is legal or illegal, however, may have nothing to do with its potential for addiction or harm: alcohol and nicotine, both addictive and harmful, are legal in most countries because they generate substantialemployment or government revenue through taxes.
Abuse
To use wrongly or improperly; misuse: abuse alcohol; abuse a privilege. or Improper use or handling; misuse: abuse of authority; drug abuse.
What Are the Different Kinds of Drug Abuse?
Someone with a drug abuse problem often displays general symptoms, regardless of the type of drug being abused: paranoia, confusion, overall attitude or mood adjustment, withdrawal from relationships or activities, abrupt changes in quality of work or school