Chapter 5 Flashcards
Drug
any substance that changes the body or its functioning
Agonists
mimic or enhances a neurotransmitter
Antagonist
may reduce release of neurotransmitter or block receptors
psychoactive drug
those that have psychological effects
addiction is identified by…
-preoccupation with obtaining a drug
-compulsive use of drug in spite of adverse consequences
-a high tendency to relapse
withdrawal
negative reaction that occurs when drug use is stopped
tolerance
person becomes less responsive to the drug, requiring increasing amounts of the drug to produce the same result
Opiates are derived from…
opium poppy
Effects of opiates
- analgesic (pain relief)
- hypnotic (sleep-inducing)
- euphoric (strong feelings of happiness)
Opiates mimic…
endorphins
Types of Opiates
morphine, codeine, laudanum, paregoric
morphine
-used to treat pain
-discovered in 1800s
codeine
-an ingredient in opium
-used as a cough suppressant
laudanum
-diluted form of opium
-used to treat diarrhea and pain
paregoric
-diluted opium
-used to quiet fretful children
Opiods
synthesized form of opiates
Heroin (opioid)
-produces an immediate, intense euphoria
-most notoriously abused drug
Conditioned or Learned tolerance
a learned association develops between tolerance and the environment in which it debelops
Depressants
drugs that reduce nervous system activity
Effects of depressants
-sedation
-anxiolytic (anxiety reduction)
-hypnotic