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psychoactive drugs
a substance that alters perception by changing the body's biochemistry
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stimulants
- speed up activity in the CNS
- -amphetamines,cocaine,tobacco(nicotine),caffeine
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depressants
- slow down CNS
- -alcohol, tranquilizers
- -calm
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opiates
- relieve pain
- -opium, heroine, porhine
- -mimic endorphins
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psychedelic
- disrupt normal thought processes
- -LSD, psilocybin,mescaline
- -produce hallucinations
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marijuana
- most widely used illicit drug in north america
- -THC
- -relaxes
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psychoactive drugs produce effects mainly on
brain neurotransmitters
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tolerance
more and more of the drug is needed to produce the same effect
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withdrawal
when heavy users stop using the drug, they experience uncomfortable symptoms
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abuse
when a drug interferes with a person's functioning or disrupts relationships
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