Yes and no.

I'm finishing up a doctorate in pharmacy and the thing is that there are soooo many factors that go into drug blood concentrations. Genes, the drug in question, diet, underlying conditions, kidney function (hard to tell when they are deceased), etc. All play a factor in drug concentrations.

We do however have basic pharmacokinetics diagrams that can apply to a lot of drugs across large populations. Most of the time they are very basic equations though, usually only considering age, weight, height.

There isn't really a perfect answer here.