General Pharmacology Flashcards
Bioavailability
Extent to which drug reaches plasma/site of action unchanged
Factor of bioavailability
Route of administration
What does Vd tell you?
Lipid solubility
Diff between clearance & rate of elimination?
Clearance: Vplasma cleared of drug per unit time
Rate of elimination: amount of drug removed per unit time
Higher Vd, ___ half life. Why?
Longer cos stay in tissue longer
Steady state concentration
Rate of drug in = rate of drug out
Difference between graded & quantal DRC?
Graded: individual study
Quantal: populational study
Efficacy
Ability of drug to produce max response
Potency
Dose needed to produce given response
Lower ED50, ___ potent drug
More
Efficacy depends on?
Number of efficacious drug-receptor interaction
Types of antagonist
(Non)-competitive
In presence of competitive antagonist, DRC ___
Shifts parallelly to right
Potency changes in presence of non-competitive antagonist. True/False?
False
Efficacy ___ in presence of non-competitive antagonist.
Decreases