Addiction is treatable, and early help matters.

• Addiction, also called substance use disorder, is a chronic, treatable medical condition.
• It can change thinking, mood, judgment, sleep, and physical health. Health problems may grow over time.
• A key sign is loss of control. A person may keep using despite harm at work, school, home, or in relationships.

Behavioral changes and family support can guide the next step.

• Common behavioral changes include secrecy, missed duties, risky choices, isolation, and sudden mood shifts.
• Treatment and recovery often work best when started early. Care may include therapy, medication, peer support, and ongoing follow-up.
• Family support also matters. Loved ones can learn what is happening, set healthy limits, and take part in recovery.
• Do not wait for the problem to become severe before seeking help.

Clinical meaning of addiction

Addiction is a medical condition marked by compulsive substance use despite harm. In the DSM-5-TR, it is diagnosed as a substance use disorder, based on impaired control, risky use, social problems, and physical effects.

How addiction differs from misuse, dependence, and tolerance

• Substance misuse: using alcohol or drugs in a harmful way, but not always meeting full disorder criteria.
• Physical dependence: the body adapts, so stopping causes withdrawal. This can happen with prescribed medicines too.
• Tolerance: needing more of a substance to get the same effect.
• Addiction: loss of control, strong compulsion to keep using, and continued use despite harm.

Why addiction is considered chronic

NIDA and CDC describe addiction as a chronic condition because it can last a long time, change brain function, and return after improvement. Like other chronic illnesses, it often needs ongoing care and monitoring.

Brain reward system and dopamine

Dopamine helps the brain reward system mark something as important. Substances can cause larger, faster dopamine signals than daily rewards. Over time, the brain starts to link the substance with relief, pleasure, or both.

Reinforcement, habits, and craving

Repeated use strengthens learned behavior. The brain gets better at seeking the substance and worse at pausing. Craving can appear when the brain expects the substance.

• Triggers can include places, people, smells, money, or certain moods.
• These cues can push use even after a person wants to stop.

Genetics, stress, trauma, and environment

Genetics can raise risk, but genes do not decide a person’s future. Risk also rises with easy access, family substance use, mental health symptoms, and social pressure. Trauma and stress can change coping patterns and make substance use feel like short-term escape.

Common signs of addiction

Addiction often shows up as impaired control, strong cravings, and continued use despite harm. Substance use disorder criteria also include tolerance, withdrawal, and risk-taking.

• Behavioral signs: hiding use, using more than planned, failed attempts to cut down, neglecting duties
• Physical signs: sleep changes, weight changes, shakiness, poor coordination, bloodshot eyes, withdrawal symptoms
• Psychological changes: mood swings, anxiety, irritability, low motivation, trouble focusing

How addiction affects daily life and health

Functional impairment is a key warning sign. Problems may show up at work, school, or home, such as missed deadlines, poor grades, conflict, or unsafe driving.

• Health and safety risks: overdose, injuries, infections, heart and liver problems, and worse mental health
• Severity is often judged by how many clinical criteria are present, including cravings, tolerance, withdrawal, and ongoing use despite harm

Addiction is common and affects millions.

The 2023 National Survey on Drug Use and Health from SAMHSA found that about 48.5 million people age 12 and older had a substance use disorder in the past year. Common substances include alcohol, cannabis, opioids, stimulants, nicotine, and sedatives. NIDA tracks how these drugs affect the brain, behavior, and long-term health.

Addiction is a major public health issue.

The CDC reports that drug overdose remains a leading cause of preventable death in the U.S. Public health impact also includes injuries, infections, mental health strain, family stress, and lost work and school time.

Treatment works, but many people do not get care.

SAMHSA data show many people with substance use disorders do not receive treatment. Research shows remission is possible, and relapse can happen, especially early on. NIDA explains that relapse rates are similar to other chronic health conditions, which supports addiction as a treatable condition, not a personal failure.

Get emergency help now for overdose or immediate danger.

Call 911 or local emergency medical services right away if a person has signs of an overdose, a suicidal crisis, or is an immediate danger to self or others. Fast action can save a life.

Warning signs that need urgent medical help

• Trouble breathing, very slow breathing, or stopped breathing. Opioids can cause respiratory depression.
• Loss of consciousness, not waking up, or fainting
• Seizures
• Blue, gray, or pale lips or fingertips
• Chest pain, severe confusion, or violent behavior

What to do right now

• Call 911.
• Give Naloxone if opioid overdose is possible.
• Call or text 988 for mental health or suicide crisis support.
• Stay with the person until help arrives.

Get a professional assessment

A licensed clinician can assess substance use, mental health, and medical needs, then match care to risk. The SAMHSA National Helpline can help you find local treatment.

Choose the right level of care

• Medical detox: 24/7 care for safe withdrawal when needed.
• Residential treatment: live-in care with daily structure.
• Partial hospitalization program: day treatment with medical and therapy support.
• Intensive outpatient program: several treatment days each week.
• Outpatient treatment: flexible visits for ongoing recovery.

ASAM supports matching treatment intensity to each person’s needs.

Use proven treatment tools

NIDA notes that therapy, family support, and medication-assisted treatment can improve outcomes. Medications may help with opioid or alcohol use disorders when appropriate.

Take the next step

After recognizing addiction, schedule an assessment, ask about insurance and levels of care, and involve trusted family support. If you are ready, an admissions inquiry can help you start treatment without delay.