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Textbook note-Chapter 17-Substance Related Disorders Apr 8

Course Code
Neil Rector

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PSY240: April 8
Chapter 17: Substance Related Disorders
Substance Abuse
substance: natural or synthesized product that has psychoactive effects ± it changes perceptions,
thoughts, emotions, and behaviours
substance related disorder: when someone structures their live around substance and forget their
duties and responsibilities (not when people use it for religious purposes)
Substance Intoxication
substance intoxication: set of behavioural and psychological changes that occur as a direct result of
the physiological effects of a substance on the CNS
people's expectations about the drug may lead them to experience that effect
diagnosis only given if:
behavioural nd psychological changes are significantly maladaptive
leading to disruption of family and social relationships
place individual at severe risk for adverse effects
set of physiological and behavioural symptoms that result when people who have been using
substance heavily for prolonged periods of time stop using substances or greatly reduce their use
symptoms of withdrawal are typically the opposite symptoms of the same substance diagnosed with
the label of intoxication
must cause severe impairment of function to be diagnosed
recurrent use of a substance results in significant harmful consequences
4 categories of harmful consequences
1. fails to fulfil important obligations
2. repeatedly uses the substance in situations in which it is physically hazardous to do so
3. repeatedly has legal problems as a result of substance use
4. continues to use the substance even though he repeatedly had social or legal problems as a
result of the use
z must show repeated problems in at least one of the 4 categories within a 12 month period
z dependence is considered more advanced condition than abuse
drug addiction
physiological dependent: when he shows tolerance or withdrawal from the substance
tolerance: present when a person experiences less and less effect from the same dose of substance
and needs greater and greater doses of substance in order to achieve intoxication
slow activity in CNS
make ppl relaxed and sleepy, reduce concentration, and impair thinking and motor skills
low doses lead to euphoria and less inhibition
high doses lead to symptoms of depression
can impair sexual functioning
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