Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 public meetings to receive feedback - can be withdrawn by FDA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.
|