Pharm Test 2 Flashcards
Pharmacodynamics
What drug does to body (therapeutic effect)
Agonist
Perfect fit “Key in lock”
Partial Agonist
Partial fit, partial response
Antagonist
Blocks the site and prevents normal response
Pharmacokinetics
What body does to drug (absorbed, metabolized, eliminated)
Where are drugs metabolized?
Liver
Where are drugs excreted?
Kidney
What is a prodrug
Drug must be converted in liver to be effective
Steady state
Amount of drug absorbed is amount excreted
Peak
Highest blood concentration of drug
Trough
Lowest blood concentration
Toxicity
Peak level is too high
Therapeautic Index
Ratio of effective dose to toxic dose
Half life
Time it takes for 1/2 of original dose to be removed from body
Bioavailability
% of drug that reaches systemic circulation
Which drug has highest bioavailability?
IV drugs
Which drug has lowest bioavailability?
PO drugs
First pass effect
What occurs when concentration of a drug is greatly reduced during absorption process