overhead4r_607 (fundamentals)

overhead4r_607 (fundamentals) - dose is re-administered...

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Fundamental Concepts in Psychoactive Drug Use Why is psychoactive drug use different than use of ‘natural’ reinforcers? 1. Toxicity. 2. Addiction 1. Toxicity Acute = Overdose CNS stimulants seizures, cardiac arrest, death CNS depressants respiratory failure, coma, death Chronic = Brain Damage Structural damage – loss of brain tissue Functional damage –impairment (i.e. cognitive, psychomotor) 2. Addiction Addiction Abuse ‘Abuse’: continued use of a substance despite consequences e.g., continued heavy drinking despite DWI arrest, license suspension Addiction 2245 Physiological Dependence Tolerance – decreased effect of an initial dose of a drug when that
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Unformatted text preview: dose is re-administered results in need for ever increasing doses to get the same desired effect (e.g., 4 beers for a social drinker causes same impairment as 15 beers for alcoholic) Withdrawal emergence of specific symptoms when drug is NOT taken (e.g., shakes, delirium tremens hallucinations in alcoholic) Both tolerance and withdrawal reflect the bodys effort to compensate for the disturbances in homeostasis produced by drug. Both tolerance and withdrawal increase the likelihood of further drug administration....
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This note was uploaded on 05/16/2010 for the course PSY psy607 taught by Professor Martinzack during the Summer '09 term at Ryerson.

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