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  2. Substance use disorder - Wikipedia

    en.wikipedia.org/wiki/Substance_use_disorder

    "Substance use pertains to using select substances such as alcohol, tobacco, illicit drugs, etc. that can cause dependence or harmful side effects."On the other hand, substance abuse is the use of drugs such as prescriptions, over-the-counter medications, or alcohol for purposes other than what they are intended for or using them in excessive ...

  3. Addiction psychology - Wikipedia

    en.wikipedia.org/wiki/Addiction_psychology

    An issue with this theory is that most addictive drugs cause an individual to build up a tolerance and the effects of the drug will decrease as an individual's tolerance increases. This requires individuals to use a higher dosage of the substance which in many causes can cause adverse side effects. [34] Dopamine is correlated with increased ...

  4. Addictive behavior - Wikipedia

    en.wikipedia.org/wiki/Addictive_behavior

    addictive drug – psychoactive substances that with repeated use are associated with significantly higher rates of substance use disorders, due in large part to the drug's effect on brain reward systems; dependence – an adaptive state associated with a withdrawal syndrome upon cessation of repeated exposure to a stimulus (e.g., drug intake)

  5. Substance abuse - Wikipedia

    en.wikipedia.org/wiki/Substance_abuse

    An appropriate drug policy relies on the assessment of drug-related public expenditure based on a classification system where costs are properly identified. Labelled drug-related expenditures are defined as the direct planned spending that reflects the voluntary engagement of the state in the field of illicit drugs.

  6. Substance dependence - Wikipedia

    en.wikipedia.org/wiki/Substance_dependence

    Substance dependence, also known as drug dependence, is a biopsychological situation whereby an individual's functionality is dependent on the necessitated re-consumption of a psychoactive substance because of an adaptive state that has developed within the individual from psychoactive substance consumption that results in the experience of withdrawal and that necessitates the re-consumption ...

  7. Opioid - Wikipedia

    en.wikipedia.org/wiki/Opioid

    Opioids are a class of drugs that include prescription painkillers (e.g., oxycodone, hydrocodone) and illicit substances like heroin. Opioid use during pregnancy is associated with an increased risk of complications, including an elevated risk of preterm birth , low birth weight , intrauterine growth restriction , and stillbirth .

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  9. Drug metabolism - Wikipedia

    en.wikipedia.org/wiki/Drug_metabolism

    Drug metabolism is the metabolic breakdown of drugs by living organisms, usually through specialized enzymatic systems. More generally, xenobiotic metabolism (from the Greek xenos "stranger" and biotic "related to living beings") is the set of metabolic pathways that modify the chemical structure of xenobiotics, which are compounds foreign to an organism's normal biochemistry, such as any drug ...