定常状態
[[File:Linear PK Example.png|400px|thumb|right|The time course of drug plasma concentrations over 96 hours following oral administrations every 24 hours. Note that in steady state and in linear pharmacokinetics AUCτ=AUC∞. Steady state is reached after about 5 × 12 = 60 hours. The graph depicts a typical time course of drug plasma concentration and illustrates main pharmacokinetic metrics]]