This text investigates the fundamental physiological and biochemical mechanisms that dictate how drugs are processed within the human body. William A. Creasey utilizes his background in pharmacology to synthesize complex pharmacokinetic principles into a practical framework. The book serves as a bridge between theoretical pharmacology and the application of therapeutics in clinical settings, focusing on the variables that influence drug efficacy and safety.

Experts recognize this work as a foundational resource for bridging the gap between laboratory pharmacology and bedside practice. Readers frequently note the clarity of the prose, which makes dense clinical concepts accessible to students and practitioners alike.