• Substance use disorders generally involve behavior patterns in which people continue to use a substance despite having problems caused by its use.
    The substances involved tend to be members of the 10 classes of drug that typically cause substance-related disorders:

    Alcohol
    Antianxiety and sedative drugs
    Caffeine
    Cannabis (including marijuana and synthetic cannabinoids)
    Hallucinogens (including LSD, phencyclidine, and psilocybin)
    Inhalants (such as paint thinner and certain glues)
    Opioids (including fentanyl , morphine , and oxycodone )
    Stimulants (including amphetamines and cocaine)
    Tobacco
    Other (including anabolic steroids and other commonly abused substances)

    These substances all directly activate the brain


    Substance use disorders meaning & definition 1 of Substance use disorders.


  • a condition that makes you unable to stop taking drugs or drinking alcohol, when this causes health problems or makes you unable to continue with your normal life:

    Substance use disorders meaning & definition 2 of Substance use disorders.

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