Test 1 Flashcards
the specific molecular changes produced by a drug when it binds to a particular target site or receptor
drug action
when drug-produced molecular changes lead to more widespread alterations in physiological or psychological functions
drug effects
drug effects based on the physical and biochemical interactions of a drug with a target site in living tissue
specific effects
drug effects based not on the chemical activity of a drug-receptor interaction, but on certain unique characteristics of an individual
nonspecific effects
the amount of drug in the blood that is free to bind at specific target sites to elicit drug action
bioavailability
What are the 5 factors that contribute to the pharmacokinetic component of drug action?
route of administration absorption and distribution binding characteristics inactivation elimination
determines how much drug is liberated and absorbed into the blood, how quickly it reaches the target, and how quickly the drug takes effect
route of administration
chemicals added to drugs to facilitate the drug’s ability to exist in different forms
excipients
What are the two factors ionization depends on?
acidity and drug ionization characteristics
Apparent volume is heavily influenced by what?
lipid solubility
the relative amount of drug that leaves circulation and enters organs
apparent volume (Vd)
the process of one drug leaving one site for another based on blood flow and lipid solubility
redistribution
the ability of a drug to move across the membrane
lipid solubility
inactive sites where drug binding occurs
drug depots
type of tolerance that causes a decrease in potency due to the reduction in efficacy through which drug carries out action
pharmacodynamic tolerance
type of tolerance in which the biologic system responds to drug by reducing the drug concentration delivered to target site, changes enzymes in the system
pharmacokinetic tolerance
tolerance due to secondary consequence of drug action; pharmacodynamic tolerance at one synapse alters activity downstream at another
physiologic tolerance
reduction in perceived potency of drug secondary to intentional change in behavior of consumer based on the anticipation of the possible adverse effects
behavioral tolerance
rapid induction of tolerance
acute tolerance
reduction in potency of one drug because of exposure to another drug in the same class
cross tolerance
increase in potency of the drug following continued exposure to the drug
reverse tolerance/sensitization
model of drug abuse/dependence: states physical dependence is key in establishment/maintenance of addiction
physical dependence model
in the physical dependence model, ___ properties of withdrawal lead to drug relapse
negative reinforcing
the concept of withdrawal symptoms conditioning users comes from with model?
physical dependence
model of drug abuse/dependence: craving is wanting to re-experience euphoria caused by activating neural circuits implicated in natural reward
positive reinforcement model
model of drug abuse/dependence: key element is distinction between drug liking (high) and drug wanting (craving)
incentive sensitization
model of drug abuse/dependence: craving is caused by neuroadaptation - alterations in brain circuits
incentive sensitization
model of drug abuse/dependence: neural mechanisms underlying affect are organized so any stimulus that provokes a strong affect response (e.g. pleasure) will activate opposing affective response (e.g. displeasure) after the initial stimulus
opponent process
the disease/medical model is a synthesis of which two models?
susceptibility and exposure
model of drug abuse/dependence: we have an inherited susceptibility to uncontrolled use
susceptibility model
model of drug abuse/dependence: chronic use alters brain, responsible for loss of control
exposure model
model of drug abuse/dependence: drug use is driven by many biological, psychological, and sociological factors that may or may not be present at time of initial experimentation
biopsychosocial model
3 basic factors involved in experimental use in biopsychosocial model
social/interpersonal, cultural/attitudinal, intrapersonal
3 levels of influence in biopsychosocial model
proximal (most direct and predictive)
distal
ultimate (less influential, greatest long term risk)
4 drug-effect related factors for development/maintenance of compulsive drug use in biopsychosocial model
postive reinforcing effects
discriminative subjective effects
stimuli conditioned to drug effects
aversive effects of drugs
pathway in which substance abuse is linked to trait cluster of impulsivity, antisociality, unconventiality, and aggressiveness combined with low levels of constraint and harm avoidance
behavioral disinhibition
pathway in which high scores on traits such as stress reactivity, anxiety, and neuroticism are indicative of heightened vulnerability to stressful life events (self medication hypothesis)
stress reduction
pathway in which there are high scores on sensation seeking, reward seeking, extraversion, gregariousness (drugs for positive reinforcing effects)
reward sensitivity