Here are some useful papers and models in pharmacometrics that I've found and written about, along with some simple explainers.
Try my Hepatic Clearance model app I made in RShiny to show a little about how the well-stirred and parallel tube models used in pharmacology differ.
Background: Drug Trail
Credit: stockmedia.cc
Source: freeimageslive
License: CC-By-3.0
Modifications: Rotated and cropped