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  1. Drug Misuse and Addiction | National Institute on Drug Abuse

    Jul 6, 2020 · Addiction is defined as a chronic, relapsing disorder characterized by compulsive drug seeking and use despite adverse consequences. † It is considered a brain disorder, because it …

  2. Drug addiction (substance use disorder) - Mayo Clinic

    Jun 20, 2025 · Drug addiction, also called substance use disorder, is a disease that affects a person's brain and behavior and leads to an inability to control the use of a legal or illegal drug or medicine.

  3. Drug Addiction: Definition, Type, Causes, Symptoms, Effects, …

    Mar 11, 2025 · Drug addiction is a chronic, relapsing disorder characterized by compulsive drug seeking, continued use despite harmful consequences, and long-lasting changes in the brain. It involves …

  4. Drug Abuse & Addiction Definition, Screening Test & Symptoms

    Drug abuse and addiction disorder is a self-destructive pattern of using a substance that causes distress and problems. Get the facts on drug abuse and addiction symptoms, causes, treatment centers …

  5. Addiction - Wikipedia

    Addiction is a neuropsychological disorder characterized by a persistent and intense urge to use a drug or engage in a behavior that produces natural reward, despite substantial harm and other negative …

  6. What is Drug Addiction? - chestnut.org

    Drug addiction is a chronic disease characterized by compulsive, or uncontrollable, drug seeking and use despite harmful consequences and changes in the brain, which can be long-lasting.

  7. Drug Addiction: Definition With Examples and Support

    Jan 31, 2024 · Though it's a treatable illness, substance use disorder recovery often involves a lifelong cycle of relapse (recurrence of use), withdrawal, and abstinence. This article will define drug …

  8. What Is a Substance Use Disorder? - Psychiatry.org

    Substance use disorder (SUD) is a complex condition in which there is uncontrolled use of a substance despite harmful consequences.

  9. Addiction: What It Is, Causes, Symptoms, Types & Treatment

    Addiction is a chronic (lifelong) condition that involves compulsive seeking and taking of a substance or performing of an activity despite negative or harmful consequences.

  10. Drug Abuse & Addiction: Effects on Brain, Risk Factors, Signs - WebMD

    Jul 1, 2025 · Addiction doesn’t only involve illegal drugs such as heroin or cocaine. You can also develop a substance use disorder with legal substances such as alcohol, nicotine, sleep aids, or...