Psychology of addiction and substance abuse

Addiction is a state of psychological or physical dependence (or both) on the use of alcohol or other drugs.

Addiction is a condition in which a person is unable to stop using a substance or engaging in a behavior.

Drug addiction is a complex medical condition. Learn more about the science of and research into addiction, health, and the brain.

Addiction is a neuropsychological disorder characterized by a persistent and intense urge to engage in certain behaviors, often usage of a drug.

Substance abuse refers to the harmful or hazardous use of psychoactive substances, including alcohol and illicit drugs.

Substance abuse is a pattern of drug use that leads to significant problems such as failure to attend work or school, driving a vehicle while.

Substance abuse, also known as drug abuse, is the use of a drug in amounts or by methods which are harmful to the individual or others.