Basics Flashcards
(27 cards)
Pharmacodynamics
biochemical and physiological effect of drugs and MOA
Pharmacokinetics
study of how the body absorbs, distributes, metabolizes and excretes drugs
Clinical testing of drugs phase 1
II
III IV
- clinical pharmacology (small group 20-80)
- clinical investigation (larger group 100-300)
- clinical trial (largest group 1k-3k)
- post marketing studies
1 ounce = how many ccs/ml?
30 ccs/ml
1 mL = how many ccs?
1
1 tsp = how many ccs?
1 tbsp =how many ccs?
5cc
15cc
we prefer drugs with a ( ) TI
HIGH
3 types of drug actions
- replacement
- interruption
- potentiation
agonist
- drug that combines w/receptor and activates
- stimulates release of an endogenous chemical
antagonist
-drug that combines w/receptor used by an endogenous chemical and blocks/diminishes the response
a partial agonist has ( ) affinity but ( ) efficacy
high, low
Potency
if the dose of drug A is less than drug B to achieve same response, A is more potent
efficacy
magnitude of the maximum biologic effect
tolerance vs dependence
tolerance-reduced response to same/increased dose due to change in receptor sensitivity
dependence-pt needs a drug to function normally
most drugs pass through membranes via
passive diffusion
first pass effect
drugs that are well absorbed in the GI tract and are metabolized by the liver have decreased bioavailability
Drugs that are bound to anything other than a receptor are ( )
inactive
the brain is highly ( )
lipophilic
Phase I metabolism and main enzyme
non-synthetic oxidation, reduction, hydrolysis
cytochrome P450
Phase II metabolism
synthetic-conjugation
predominant CYP450 isoform
CYP3A4 (benzos, HIV, Ca blockers)
most studied genetic polymorphism
CYP2D6 (psychotropics, codeine, beta blockers)
the control of excreting a drug is via the
kidneys and is pH related
clearance
rate at which the drug is eliminated from the body