lecture_Ch06[1]

lecture_Ch06[1] - Drugs and Behavior CNS Depressants:...

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Unformatted text preview: Drugs and Behavior CNS Depressants: Sedative-Hypnotics PSY 291 General Drug Classes Stimulants- Increase energy, alertness, pulse rate and blood pressure- Ex. Cocaine, amphetamines, caffeine, tobacco Depressants- Sedatives; Relieve stress & anxiety- Ex. Barbiturates, Benzodiazepines, alcohol Hallucinogens / Psychedelics- Alter perceptions, thoughts, feelings- Ex. LSD, PCP Heath Ledger (19792008) Michael Jackson (19582009) DEPRESSANTS Relieve stress, tension and anxiety Reduce CNS activity and diminish the brains level of awareness Induce sleep (e.g. tranquilizers or sleeping pills) Remove inhibitions, i.e. disinhibit Produce a high that is a result of disinhibitory effects on the behavior Depress or slow down body functions Why are CNS depressants problematic? Second most frequently abused prescription drug, sometimes contributes to death due to accidental overdoses Seemingly unrelated drug groups can cause CNS depression Combination use can cause dangerous drug interactions (synergistic effect) Usually prescribed under physician direction Most problems associated with these drugs due to inadequate professional supervision Can cause very alarming and dangerous behavior if not closely monitored Can cause disruptive personality changes The history of CNS depressants Alcohol - Earliest most common CNS depressant Attempts to find CNS depressants other than alcohol began in the 1800s. Bromides- Introduced to treat nervousness and anxiety - Very popular but toxic History Barbiturates (early 1900s)- Replaced bromides; believed to be safe and effective- Problems with tolerance, dependence, and safety Narrow margin of safety Doses that reduced anxiety also reduced respiration and impaired mental functions History In the 1950s the first benzodiazepines were marketed as substitutes for barbiturates....
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lecture_Ch06[1] - Drugs and Behavior CNS Depressants:...

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