Definition of pharmacokinetic groups: groups in drug molecules that determine the pharmacokinetic properties of drugs and affect the absorption, distribution, metabolism and excretion of drugs in vivo.

First of all, pharmacokinetics, as a science that deals with the dynamic process of drugs in vivo by mathematical analysis, has great theoretical value and is an important part of "mathematical pharmacy". Its basic analytical methods have penetrated into biopharmaceutics, clinical pharmacy, pharmacotherapy, clinical pharmacology, molecular pharmacology, biochemistry, analytical chemistry, pharmacy, pharmacology and toxicology, and become the most important and close foundation of these disciplines.

At the same time, pharmacokinetics has wide practical significance. Its development will objectively evaluate existing drugs, actively design new drugs, improve drug dosage forms, provide drugs with high efficiency, quick effect, long-term effect and low toxic and side effects, and especially have important practical value in guiding clinical rational drug use. Through the study of pharmacokinetic characteristics, it is necessary to choose the best dosage, calculate the administration cycle and design the best administration scheme for clinical treatment.

In a word, pharmacokinetics has become a new and useful tool, widely used in the field of pharmacy and various disciplines, and has become a subject that medical researchers and medical workers need to understand and master.