Addiction & Recovery

What Addiction Is — and Why Recovery Is Possible

Addiction is a treatable, chronic condition in which a person keeps using a substance or repeating a behavior despite clear harm to their health, relationships or responsibilities. It is shaped by biology, psychology and environment together, and it is not a sign of weak character. Recovery is realistic: long-term studies show that most people who develop a substance use disorder eventually stop meeting its criteria.

Psychologists usually describe addiction through four features, sometimes called the "four Cs": craving, loss of control over how much or how often, compulsion to use, and continued use despite consequences. These features can appear with alcohol, nicotine, cannabis, opioids or stimulants, and in some cases with behaviors such as gambling or gaming.

This page gives an overview of the whole area. For a deeper look at the learning and motivation processes involved, see the companion guide to the psychology of addiction.

Substance Use Disorders

The DSM-5-TR no longer separates "substance abuse" from "substance dependence," as earlier editions did. Instead it describes a single substance use disorder for each class of substance, rated mild, moderate or severe depending on how many of 11 criteria a clinician identifies over a 12-month period. The criteria fall into four groups:

Tolerance and withdrawal on their own do not equal addiction. A person taking a prescribed medicine exactly as directed can develop both without having a use disorder, which is why the DSM excludes them in that situation. The core of addiction is the behavioral pattern of lost control and continued use despite harm.

Substance classes covered by the manual include alcohol, cannabis, hallucinogens, inhalants, opioids, sedatives, stimulants and tobacco. Caffeine causes recognized intoxication and withdrawal, but caffeine use disorder is listed only as a condition for further study.

Behavioral Addictions

Some activities can become compulsive in ways that resemble substance addiction: rising preoccupation, failed attempts to cut back, and continued engagement despite harm. The research base, however, is uneven.

• Gambling disorder is the only behavioral addiction formally listed in the DSM-5-TR, placed alongside substance use disorders because brain imaging and treatment research showed strong overlaps.
• Gaming disorder is included in ICD-11, while the DSM-5-TR lists internet gaming disorder as a condition needing further research. See gaming addiction.
• Food, shopping, sex, work and social media are frequently described as addictions in everyday language, but researchers still debate whether they are best classed as addictions, impulse-control problems or ways of coping with distress. Related guides cover food addiction, shopping addiction and workaholism.

Critics warn that labeling every enjoyable but excessive activity an "addiction" risks pathologizing ordinary life. Supporters reply that some people experience real, lasting impairment that deserves recognition and help. Both points are worth holding in mind.

Understanding the Science & Getting Treatment

How addiction changes the brain

Neuroscientists George Koob and Nora Volkow describe addiction as a repeating cycle with three stages, each linked to different brain systems:

1. Binge/intoxication. Substances trigger large surges of dopamine in the brain's reward circuitry, especially the nucleus accumbens. Cues linked to use, such as places, people or moods, become powerful reminders through a learning process similar to classical conditioning.
2. Withdrawal/negative affect. With repeated use, the reward system becomes less responsive and the brain's stress systems become more active. Everyday pleasures feel flatter, and the person increasingly uses to escape discomfort rather than to feel good, a pattern called negative reinforcement in operant conditioning.
3. Preoccupation/anticipation. Changes in the prefrontal cortex weaken the ability to plan, weigh consequences and resist urges. Craving rises, especially under stress.

Because the brain shows neuroplasticity, many of these changes can recover over months of reduced use, which helps explain why cravings tend to ease with time.

Is addiction a disease or a choice?

The "brain disease model," promoted by the U.S. National Institute on Drug Abuse, helped reduce stigma and drew attention to biology. It has critics. Psychologist Gene Heyman points out that many people quit without treatment, often in their late twenties or thirties as life responsibilities grow, which suggests that choice and circumstance still matter. Others emphasize social causes such as poverty, isolation and trauma.

Most current researchers take a biopsychosocial view: biology shapes vulnerability, psychology shapes how people cope, and environment shapes opportunity and consequences. That view supports treatment and support rather than blame.

Risk and protective factors

Evidence-based treatment

Treatment is matched to the person, the substance and the severity. Approaches with solid research support include:

• Motivational interviewing: a collaborative conversation style, developed by William Miller and Stephen Rollnick, that helps people resolve mixed feelings about change.
• Cognitive behavioral therapy: identifies triggers, challenges beliefs that maintain use, and builds coping and refusal skills.
• Contingency management: provides small, concrete rewards for verified abstinence. It has some of the strongest evidence of any approach, particularly for stimulant use.
• Family and couples approaches: such as community reinforcement and family training, which helps relatives encourage a loved one into treatment.
• Mutual-help groups: twelve-step and secular groups. A 2020 Cochrane review found Alcoholics Anonymous and twelve-step facilitation performed as well as or better than other established treatments for sustained abstinence from alcohol.
• Medication: for alcohol, opioid and tobacco use disorders, there are approved medications that a doctor may discuss as part of care. These decisions belong with a prescriber.

Withdrawal from some substances, notably alcohol and sedatives, can be medically dangerous, so stopping heavy use should be planned with a medical professional.

Recovery, Coping Skills & Support

Recovery is usually described as more than abstinence. SAMHSA's working definition highlights four dimensions: health, a stable home, a sense of purpose, and community. People take many paths, from formal treatment to mutual-help groups to change on their own.

Relapse prevention

Relapse prevention, developed by psychologists G. Alan Marlatt and Judith Gordon in the 1980s, treats a return to use as a learning event rather than a total failure. It teaches people to:

• Recognize high-risk situations, such as strong emotions, social pressure or familiar cues.
• Plan alternative responses in advance.
• Avoid the "abstinence violation effect," the all-or-nothing thinking that turns a single slip into a full relapse.
• Build a balanced lifestyle with rewarding activities that compete with use.

Mindfulness-based relapse prevention adds skills such as urge surfing, in which a person notices a craving rise, peak and fall without acting on it.

Harm reduction

Harm reduction meets people where they are. It includes overdose-reversal training and naloxone distribution, syringe services, drug-checking and safer-use education. Research links these programs to fewer overdose deaths and lower rates of HIV and hepatitis C, without increasing use. Many people first connect with treatment through harm reduction services.

Supporting someone with addiction

Family members often feel torn between helping and enabling. Research favors staying connected, setting clear boundaries, rewarding steps toward change and looking after one's own wellbeing. Confrontational "interventions" have weaker evidence than supportive, motivational approaches. Patterns of codependency can develop in close relationships and are worth recognizing.

Recovery Is Possible

Large U.S. surveys estimate that tens of millions of adults describe themselves as being in recovery from a substance use problem. Addiction is common, but so is change. Understanding the science, finding the right mix of support and building new coping skills all make lasting recovery more achievable.