What is addiction?

Addiction describes a pattern in which a substance or activity becomes very hard to control, takes up more and more of a person's life, and continues even when it causes serious harm. NIDA describes drug addiction as a chronic, relapsing condition characterized by compulsive drug seeking and use despite adverse consequences, and stresses that it is treatable.¹

In clinical settings, the word addiction is often replaced by more precise diagnoses: substance use disorder (for example, alcohol use disorder or opioid use disorder) and, for a small number of behaviors, gambling disorder and gaming disorder. These diagnoses describe a range from mild to severe.

Loss of control

Doing more, or for longer, than intended; trying to cut back without success.

Priority

The substance or behavior crowds out other interests, responsibilities, and relationships.

Persistence despite harm

Continuing even when the person can see it is damaging their health, money, work, or family.

Craving

Strong urges, often triggered by people, places, moods, or reminders.

• Not a moral failing. Major U.S. health authorities describe addiction as a health condition shaped by biology, psychology, and environment.²
• Not the same as any use. Many people use alcohol or other substances, or gamble, without developing a disorder.
• Not the same as physical dependence. Someone who takes a prescribed medicine every day can be physically dependent — with withdrawal if they stop — without addiction. See tolerance, dependence, and withdrawal.
• Not permanent by definition. Most people with substance use disorders eventually improve, many without ever entering formal treatment, and treatment raises the odds.

A landmark review in JAMA compared drug dependence with other chronic illnesses such as type 2 diabetes, hypertension, and asthma. It found similar heritability, similar influence of behavior and environment, and comparable rates of return to symptoms after treatment ends.³ The implication is practical: like other chronic conditions, addiction often needs ongoing management, and a return of symptoms signals a need to adjust care rather than a reason to give up.

Labels like "addict" or "junkie" reduce a person to one part of their life, and research has shown that stigmatizing terms can affect how even clinicians view a patient. GAREP uses person-first language: "a person with an alcohol use disorder," "someone in recovery." People are free to describe themselves however they choose, and many find words like "alcoholic" meaningful in their own recovery.