Pharmacokinetics Flashcards
when a constant amount of a drug is eliminated per unit of time (i.e., 15 mg/hr)
- “0 shows the amount”
zero-order kinetics
when a proportion of the drug is eliminated per unit of time (i.e., 50%/hr)
- “First cut in the cake”
first-order kinetics
highest concentration of drug in blood stream
peak
when serum drug levels in the body remain constant
steady state
lowest concentration of drug in the bloodstream
trough
time for serum drug concentration to decrease by 50%
half-life
increasing dose =
loading dose
steady dose =
maintenance dose
decreasing dose =
taper dose
increases rapidly, then tapers off steadily (solid line) =
loading dose followed by infusion
increases rapidly, then tapers off dramatically (small-dashed line) =
bolus dose w/o infusion
increases slowly over time (large-dashed line) =
infusion w/o loading dose