**=> To understand the assumptions associated with the one compartment model**

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=> To understand the properties of first order kinetics and linear models**

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=> To write the differential equations for a simple pharmacokinetic model**

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=> To recognize and use the integrated equations for a one compartment linear model**

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=> To define, use, and calculate the parameters, kel, t _{1/2}, V, and AUC as they apply to a one compartment linear model**

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Definition: Pharmacokinetics is the study of drug and/or metabolite **kinetics** in the body. It deals with a mathematical description of the rates of drug movement into, within and exit from the body. It also includes the study of drug metabolism or biotransformation rates. The body is a very complex system and a drug undergoes many steps as it is being **absorbed**, **distributed** through the body, **metabolized** or **excreted** (**ADME**).

**Diagram IV-1, Drug Disposition**

The drug also interacts with receptors and causes therapeutic and/or toxic responses. Although the details of drug kinetics are complicated it is fortunate that we can often approximate drug kinetic processes using "simple" mathematical models.

This page was last modified: 12 February 2001

Copyright 2001 David W.A. Bourne