B7-077 Substance Use Disorder Flashcards
all drugs of abuse reinforce behavior patterns through the mesolimbic system, projecting from the […] to the […] in the brain
VTA
nucleus accumbens
[…] onset maximizes reward
rapid onset
(IV > smoked > oral)
why is fentanyl more potent than morphine?
highly lipophilic (penetrates the BBB faster)
allows for dermal and intranasal administration (typically has poor GI absorption)
why are “free based” forms of cocaine and nicotine more addictive?
substance has been chemically altered to be more potent and volatile, allowing for more rapid onset
initial drug exposure engages emotional regulation and neuroplasticity to cause what effects on in the brain? [2]
salient pleasurable effect
imprinted positive memory tied to first
(incentive salience)
conditioned response from subsequent exposure to drugs
cue-induced cravings
cue exposure, reactivity, and craving predict […] and use
relapse
addiction cycle
incentive salience
withdrawal
euphoric recall/positive expectancy
adaptive neuro changes after repeated exposure/withdrawal cycles [3]
diminished drug effects
reward deficit, stress reactivity
impaired executive function
brain structure involved in the binge/intoxication stage
basal ganglia
brain structure involved in the withdrawal stage
amygdala
brain structure involved in the preoccupation/anticipation stage
frontal cortex
most drug use begins in
adolescence
developmental process of addiction
predisposing factors –> adolescent developmental processes –> maintenance –> addiction
risk factors for SUD
family history
early onset of drug abuse
environmental exposures
genes impacting […] of drug use are specific to individual substance
progression
(she mentioned maybe having a variant of mu receptor making you less likely to use opioids)
genes impacting […] of drug use are a common set of gene across all substances
initiation
SUD often co-occurs with
mental illnesses
2-3 symptoms of SUD is […]
mild
4-5 symptoms of SUD is […]
moderate
6-7 symptoms of SUD is […]
severe
stimulants cause extensive cardiac side effects due to
vasoconstriction
[…] drugs can cause septal damage, loss of smell
snorting
[…] drug use can transmit infections and cause vascular problems
IV