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56 Cards in this Set

  • Front
  • Back
therapeutics
branch of medicine concerned with the prevention of disease and treatment of suffering
pharmacotherapy
pharmacotherapeutics
application of drugs for the purpose of disease prevention and treatment of suffering
drug
chemical agent capable of producing biological response within the body
medication
after drug is administered, called medication
biologics
agents naturally produced in animal cells, by microorganisms, or by the body itself
examples of biologics
hormones, monoclonal antibodies, blood products and components, interferon, vaccines
complementary / alternative therapies
natural plant extracts, herbs, vitamins, minerals, dietary supplements. (accupunture, biofeedback, massage)
pharmacopoeia
medical reference summarizing drug purity, strength, directions for synthesis
formulary
list of drugs, and drug recipes
FDA
food & drug administration: established to facilitate safe, effective drugs - and keeping others off market; improve americans, provide clear and understandable drug info. for safe and effective use
4 Stages of New Drug Development
Preclinical Investigation, Clinical Investigation, Review of the New Drug Application, Postmarketing surveillance
1. Preclinical Investigation
involves lab research. tests on human/microbial cells, and animals (1-3years)
2. Clinical Investigation
longest part of drug testing, healthy volunteers to determine dosage/side effects. 2-10 years
3 NDA Review
clincal phase III trials and animal testing may continue.. NDA review - 17-24 months
4. Postmarketing surveillance
survey for harmful effects in a larger population. public meetings to receive feedback - can be withdrawn by FDA
therapeutic classification
based on what the drug does clinically (ex: anticoagulant)
pharmacologic classification
based on how the drug produces its effect
(more specific than therapeutic)
ex: calcium-channel blockers
mechanism of action
how a drug produces its effect in the body
chemical name
chemical properties
7-chloro-1,3-dihydro-1-methyl- etc.
generic name
less complicated, easier to remember
trade name
short, easy to remember. brand name.
bioavailability
physiological ability of the drug to reach its target cells and produce its effect
dependence
physiological, or psychological need for a substance
physical dependence
altered physical condition caused by the adaptation of the nervous system to repeated drug use. withdrawal sx
psychologically dependent
individual feels a compelling desire, craving to continue drug use
controlled substance
drug whose use is restricted by the Controlled Substance Act
pharmacokinetics
what the body does to the drug
diffusion/passive transport
usually small particles, movement from an area of higher concentration to lower concentration
(lipid-soluble)
active transport
movement of chemical against a concentration or electrochemical gradient. bigger particles
(water-soluble)
absorption
process of movement of a substance from its site of administration to fluids
what effects absorption?
high doses -- rapid onset, IV - most rapid, syrup - faster
digestive motility, pH, food
enzymes
distribution
transport of pharmacologic agents through body.
blood --> body tissues
what effects distribution?
greater blood flow - delivered
lipid soluble drugs
protein complexes
affinity
blood-brain
fetal-placental
metabolism "biotransformation"
changes drug so it can be excreted
primary site: liver
P-450 System
elderly/children -
P-450 System
inactivates drug
accelerates drug excretion
*some drugs cannot be swallowed because of this*
excretion
primary site: kidney
ionized/water-soluble filtered
what effects excretion
renal failure
pH
enteropathic recirculation
percentage of drug is recirculated numerous times with bile. - prolongs activity of drug -- can occur for several weeks
toxic concentration
level of drug that will result in serious adverse effects
therapeutic range
plasma drug concentration between the minimum effective concentration and the toxic concentration
plasma half-life
drug's duration of action, length of time required for plasma concentration of a medication to decrease by half after administration
greater the half-life, the longer it takes to be secreted
loading dose
higher amount of the drug, given only once or twice, given to "prime" the bloodstream
maintenance doses
before plasma levels can drop back to zero, intermittent maintenance doses are given to keep the plasma drug concentration in the therapeutic range "equilibrium"
pharmacodynamics
what the drug does to the body
frequency distribution curve
graphical representation of the number of clients repsonding to a drug action at different doses: peak: largest # of clients responding to drug
median effective dose (ED50)
middle of the frequency distribution curve - dose required to produce a specific therapeutic response in 50% of the group of clients
median lethal dose (LD50)
often determined in preclinical trials, LD50 dose of drug that will be lethal in 50% of a group of animals
potency
a drug that is more potent will produce a therapeutic effect at a lower dose, compared to another drug in the same class
efficacy
magnitude of maximal response that can be produced from a particular drug
* more important
agonist
when body isn't doing what it's suppose to: we can give agonist to bind to receptor to make body do MORE of what it usually dose
ex: of agonist
beta2 effects lungs
makes airway bigger
(inhaler) : binds to receptors to open airway
Partial Agonists
bind to receptor: weaker response than agonist
Antagonists
occupy receptor. BLOCKS body response: make body do LESS of what its doing
onset
time drug starts after given
"starts to ease pain"
peak
when drug works completely, pain completely gone.
duration
effects of drug gone -- whole amt. of time drug working from administration --> stop.