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Models of Addiction Lecture

Psychological dependence is dened as dependence on a

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Unformatted text preview: use of a drug that has produced tolerance and where nega,ve physical symptoms of withdrawal result from abrupt discon,nua,on or dosage reduc,on. •  Symptoms which are caused by physiological adap,ons in the central nervous system and the brain due to chronic exposure to a substance. Symptoms which may be experienced during withdrawal or reduc,on in dosage include increased heart rate and/or blood pressure, swea,ng, and tremors. More serious withdrawal symptoms such as confusion, seizures, and visual hallucina,ons indicate a serious emergency and the need for immediate medical care. Seda,ve hypno,c drugs such as alcohol, benzodiazepines, and barbiturates are the only commonly available substances that can be fatal in withdrawal due to their propensity to induce withdrawal convulsions. Psychological Dependence •  is defined as dependence on a psychoac,ve substance for the reinforcement it provides, a “need” for a par,cular substance because it causes enjoyable mental effects. •  begins ader the first trial which a person then becomes sa,sfied and the sa,sfac,on increases with each use. This constant feeling leads to psychological reinforcement which eventually leads t...
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