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Lecture 10

Lecture 10-Substance Related Disorder Apr 8

Course Code
Neil Rector

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PSY240: April 08
Substance Related Disorder
Percentage of US population using drugs in the past month
alcohol and cigarettes are the highest
heroin is the lowest
percentage using for Canada are on the rise
½ of all deaths is linked to alcohol
Substance Related Conditions Recognized by the DSM-IV
substance intoxication
substance abuse
substance dependence
substance withdrawal
Substance Intoxication
³behavioural and psychological changes that occur as a direct result of the physiological effects of a
substance on the CNS
the specific symptoms of the intoxication depends on what substance is taken, how much is taken,
how long the substance has been ingested, as well as the user's tolerance levels
people's expectations about a substances effects influence the symptoms shown
the environment or setting where the substance is taken can influence the types of symptoms people
only given when there is severe impairment, adverse outcome predicted, social situation suffers or
legal problems.
Substance Abuse
the diagnosis of SA is given when the person's recurrent use of a substance results in significant
harmful consequences
there are 4 categories of harmful consequences that suggest SA in DSM-IV
fails to fulfil important obligations at work, school, home
repeatedly uses the substance in situations which it is physically hazardous to do so
repeatedly has legal problems as a result of substance use
continues to use the substance even though he repeatedly had social or legal problems as a
result of the use
a person has to show repeated problems in at least one of these categories within a 12 month period
to qualify for a diagnosis of substance abuse
Substance Dependence (more severe)
the diagnosis of substance dependence preempts the diagnosis of substance abuse, since
dependence is considered a more advance condition than abuse
a person is physiological dependent on a substance when he/she show either tolerance or
withdrawal from the substance
Substance Withdrawal
involves a set of maladaptive physiological and behavioural symptoms that result when ppl who
have been using substances heavily for prolonged periods stop
symptoms of withdrawal can begin a few hours after a person stops ingesting a substance or
substances that break down quickly break down in the body, such as heroin or alcohol
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