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  1. Dictionary
    Sub·stance a·buse

    noun

    • 1. overindulgence in or dependence on an addictive substance, especially alcohol or drugs.

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  3. www.mayoclinic.org › diseases-conditions › drugDrug addiction (substance use disorder) - Symptoms and causes

    Oct 4, 2022 · 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. Learn about the signs, symptoms and causes of drug addiction, and how to get help from Mayo Clinic.

  4. www.verywellmind.com › substance-use-4014640Substance Use: Overview, Definition, Types, and Risks

    Jul 18, 2023 · Substance use is a pattern of harmful use of any substance for mood-altering purposes. Learn about the causes, effects, and treatments of substance misuse, including illegal drugs, prescription drugs, alcohol, and nicotine.

  5. www.merriam-webster.com › dictionary › substance abuseSubstance abuse Definition & Meaning - Merriam-Webster

    Substance abuse is the excessive or unjustified use of a drug, such as alcohol, narcotics, or cocaine. Learn more about this term, its etymology, and related words from the Merriam-Webster unabridged dictionary.

  6. en.wikipedia.org › wiki › Substance_abuseSubstance abuse - Wikipedia

    Substance abuse, also known as drug abuse, is the use of a drug in amounts or by methods that are harmful to the individual or others. It is a form of substance-related disorder. Differing definitions of drug abuse are used in public health, medical, and criminal justice contexts.

  7. www.psychiatry.org › patients-families › addictionPsychiatry.org - What Is a Substance Use Disorder?

    Substance use disorder is a complex condition in which people use a substance despite harmful consequences. Learn about the causes, effects, and treatments of this disorder, and how to help a friend or family member.

  8. nida.nih.gov › publications › drugs-brains-behaviorDrug Misuse and Addiction | National Institute on Drug Abuse

    Drug addiction is a chronic, relapsing disorder characterized by compulsive drug seeking and use despite adverse consequences. It involves functional changes to brain circuits involved in reward, stress, and self-control. Learn about the risk and protective factors, biological and environmental influences, and signs of addiction.

  9. nida.nih.gov › publications › drugfactsUnderstanding Drug Use and Addiction DrugFacts | National ...

    Jun 6, 2018 · Drug addiction is a chronic disease that affects the brain and makes it hard to stop using drugs despite harmful consequences. Learn how drugs change the brain, what factors influence addiction risk, and how treatment and prevention can help.

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