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Substance Disorders
Psychoactive = alters behavior/mood
• Use
= ingesting psychoactive substances in moderate amounts
- no life impairment
- not a disorder
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• Intoxication
= physiological reaction to ingesting excess substance
• Abuse
= recurrent & maladaptive pattern of use (life impairment/distress)
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• Dependence/addiction
a) Physical
- tolerance = increasingly greater amounts of drug needed for same desired effect
- withdrawal = severe negative physiological reaction to removal of substance, alleviated by the substance
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b) Psychological addiction
- drug-seeking behaviors
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Types of Psychoactive Substances
• Depressants
= decrease CNS activity
- often physical dependence
- death by decreased vital organ functioning& by withdrawal
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• Opioids = narcotics
(reduce pain & induce sleep)
- death by decreased respiration
- very unpleasant withdrawal
but not life-threatening
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• Stimulants
= increase CNS activity
- most common
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• Hallucinogenics/Psychodelics
= change perception
- no evidence of withdrawal
- psychological dependence
- quick tolerance to most
- reverse tolerance to marijuana
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Alcoholism
• 10-14% U.S. adults (dependence or abuse)
• 1983 cost of alcoholism = $117 billion
• 1/3 medical problems/inpatient care
• 50-80% traffic injuries & deaths
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History
• 17th c. US - heavy drinking commonplace
• 18th & 19th c. - Change in view of alcohol
“Demon Rum”
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Levine’s socioeconomic theory
• Colonials thought behavior shaped by church (external locus of control)
• Less blame for person
• Industrialism => rise of individual(internal locus of control)
• Alcoholism = loss of self-control
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Gusfield
• Colonial Am. = rich elite & poor masses
• Industrialization = middle class & “empowering of mass”
• Temperance movement = keep elite in control
• Alcohol is evil
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• Today: more moderate
• Alcohol seen as direct cause of deviantbehavior
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Models of Alcoholism
I. Alcoholism as a Disease
A. Rush, M.D. – 18th c.
alcoholism as disease & moral problem
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• Alcohol causes drunkenness (external LOC)
• Alcoholism is a disease
• Result = lose control of behavior
- not from person’s immorality
- from alcohol’s addictive nature
• Abstinence is only cure -> prohibition
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B. 1960 - Jellinek
Most prevalent type includes physicaltolerance & dependence/withdrawal
- the individual (internal LOC)
- alcoholics are different
- loss of control as key
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C. Alexander (1988)
Genetic Env. Stress
Predisposition
Susceptibility Addiction Life Problems
Upbringing Exposure to Drugs
(Env. Predisp) & Access
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• AA: Life problems -> bottoming outEither die or recover
• The current, dominant model
• Disease model allows for tx, reduces stigma (& responsibility)
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II. Cognitive Model of Alcoholism
- Loss of control due to expectancies
- AA/mainstream model leads to failure
“One drink, one drunk”
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3.Behavioral Models of Alcoholism
a. Positive Reinforcement
- drugs make us feel good
- Addiction = recurrent use to recapture
the feeling
BUT - not all evidence supports
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b. Negative Reinforcement
- drugs to escape unpleasant experiences
=> tension reduction/self-med
Once physically dependent,withdrawal -> increased use
But evidence does not support
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c. Associative learning (cues)
- to maintain problem
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4.Neural Sensitization - Current theory- Brain cells become sensitized to drug from
repeated exposure- Mesolimbic system is involved in
motivation- So increased motivation for drug- Systems cause wanting, not liking
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Initial use -> liking
-> wanting (incentive value)
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Treatment of Alcoholism
1.Biological Treatment
a. Agonist substitution
- use other, similar drug
- can develop tolerance
- can become addicted
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b. Antagonist drugs
- block or counteract drug
- can reduce craving
BUT - must be motivated
- can cause withdrawal
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c. Aversive Treatment
- Drugs that cause unpleasantnessif take the addictive drug
- Again, must be motivated
- Can include behavioral methods
d. Classical/associative conditioning
- change cues for drinking
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2.Alcoholics Anonymous - popular
- Self-help group of lay people who providesupport
- Alcoholism = loss of control from allergy - Solution: total abstinence
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Results from AA• Positive response• Negative response
Fosters dependency & reduces responsibility• Research: little & difficult to conduct
more positive outcome
however, 75% drop out by 1 year
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3.Cognitive/Behavioral Treatment
A. Controlled Drinking
- Teach some alcoholics to drink in alimited, social way
- Expectancies lead to outcomes
- Research = better than abstinence
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B. Relapse Prevention – Current
- failure of coping skills
- tx = change beliefs
& focus on negative consequences
- identify high-risk situations& develop strategies
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• Overall picture for treatment: 70-80% nothelped long-term by any approach