L14 Drugs - Psychoactive Drugs Pop Quiz on Drugs 1....

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Psychoactive Drugs Pop Quiz on Drugs 1. Programs such as D.A.R.E. have been shown to be effective and have helped cut the use of drugs such as marijuana in recent years. 2. It has been shown that for experienced users, driving under the influence of marijuana is safer than driving under the influence of alcohol. 3. Opium was once used to help alcoholics kick their habit.
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4. Experienced users of marijuana get high more quickly than beginning users. 5. It is possible to drink enough alcohol in five minutes to kill yourself. 6. The body’s physiological reaction to crack cocaine and amphetamines is quite similar.
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How drugs work Pre-synaptic Neuron Post-synaptic Neuron Transmitter substance Transmitter reuptake Receptor site Blocked site
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Brain Pathways of Drugs Recent research has shown that a pathway called the mesolimbic dopamine system, which originates in the brain stem and runs to higher level in the frontal cortex, is affected by drug use. This pathway normally regulates natural drives (food, drink, sex), but with prolonged drug use long-lasting changes, including changes in gene expression can occur.
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Frequency of Drug Usage 42% of the population aged 12 and older report using illicit drugs during their lifetimes. 13% report using illicit drugs in the last year. 7% report using illicit drugs in the last month. High school seniors report illicit drug usage at 31% in 1975, 14% in 1992, and 26% in 2001.
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Emergency Room Episodes (2001) Cocaine-related substances – 193,034 Marijuana/hashish – 110,512 Heroin-related – 94,804 Methamphetamine/speed – 14,923 Largest increase 1990 to 2000 in marijuana/hashish from 15,706 to 110,512
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Heritability and Co-morbidity Family studies show drug abuse/dependence to have a heritability component with twin studies at about 50%. Among the mentally ill there is a high
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L14 Drugs - Psychoactive Drugs Pop Quiz on Drugs 1....

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