tolerance (class) Flashcards
Feeling of “high” doesn’t “feel as good”
illicit drug tolerance def
does not alleviate symptoms
medical drug tolerance def
Desensitation to drug effects”
tolerance
tolerance can result from? (3)
- repeated exposure that affects physiology (dosage, rates–> time)
- developmental/physiological changes that alter chemical reactions
- psychological state (expectancy, boredom)
tolerance is dependent on? (2)
- drug type (toxicity, accrued or eliminated)
- body (selective tolerance)
one effect is diminished, but another is not
selective tolerance
drinking a coke right before bed and falling asleep right away but then needing a coffee every morning to wake up is an example of?
selective tolerance
Used synonymously with potential treatment
tolerance
what else can change the tolerance level of a dug? (3)
- psychological state (might just feel higher cause your bored)
- behaviour (what you are doing)
- environment (taking it at home vs taking it at the club)
Physiological response (i.e. CNS; enzymes, receptors) --> what type of tolerance
functional tolerance
what type of tolerance are ppl used to seeing
functional tolerance
- Occurs after several exposures – Cellular adaptation similar to acute, except over time/repeated exposure
- > what type of tolerance
functional tolerance
Requires more drug to obtain similar subjective effect (graded)
functional tolerance
taking more drugs to avoid withdrawal symptoms is a characteristic of what?
functional tolerance
occurs after only one exposure
acute functional tolerance
Physiological efficiency; cells lose sensitivity to a drug • May have to do with toxicity of drug/metabolite, and similarity to endemic compounds
acute functional tolerance
Reduces the subjective effect (threshold) – including in cross-tolerance
acute functional tolerance
what is cross tolerance?
there is sugar in alcohol so and if your used to eating lots of sugar your body may respond the same based on similarity (eat lots of sugar, build ore tolerance to alcohol)
during acute functional tolerance, psychological effects are observable during? and not?
- increase, not elimination
what is the cell adaption theory based off of?
homeostasis
Body attempts to obtain a state in which energy/resources are used most efficiently, with the least “loss” (balance)
homeostasis
homeostasis is regulated by?
receptors and neurotransmitters
upregulation?
down regulation?
- increase sensitivity to a drug
- avoid toxicity (activiation cause by drug)
what changes in upregulation/down regulation
the number of receptors or the number of NT, NOT the sensitivity of receptors
(always an opposite rxn b/w NT and receptors)
Changes in metabolism as a result of constant concentrations within the body
dispositional tolerance
during dispositional tolerance, there are increased rates of (3)
- enzyme - specific proliferation
- elimination from body
- induces cross tolerance
problem with enzyme specific proliferation
physiological “cost”, and potential harm to similar substrates (the body spends more time making enzymes when it knows something is coming)
problem with elimination from the body (during dispositional tolerance)
zero order elimination induces stress
the main problem with dispositional tolerance
maintaining constant drug levels (or with ilicit drugs –> shorter high time)
Tolerance that extends to another (similar) drug
cross tolerance
Enzymes respond to specific sections of molecules, thus similar chemical structure results in deactivation
metabolism response to cross tolerance
in cross tolerance, the 2 drugs will have similar ?
SOA
during cross tolerance, the similar SOA results in ? of receptors that affect neurotransmission of all NT at the receptor
down regulation
An upper limit to neurotransmitter release implies a plateau in reward-feedback (dopamine)
–> what is this a characteristic of?
the similar feedback mechanism in cross tolerance
A psychological association that results in physiological “readiness”
environmental dependent tolerance
Responsible for OD in strange environments
environmental dependent tolerance
environmental dependent tolerance is a ? response. it works as a complex reward feedback system between?
- conditioned
- perception and homeostasis
Increased response to drug, despite prolonged use
sensitization (reverse of environmental tolerance)
less drug, sooner, last longer • Seemingly irreversible
sensitization (reverse of environmental tolerance)
sensitization can be due to damage of?
brain tissue
adjustment and compensation as a result of experience
behavioural tolerance
what type of tolerance discussed is not “true” tolerance?
behavioural tolerance
what type of tolerance has to do with self awareness and determination
behavioural tolerance
trying not to act drunk in front of your parents is an example of
behavioural tolerance