The science and technology associated with pharmacy has progressed enormously over the past few decades. Significant advances in understanding of diseases have necessitated the need to optimize the drug therapy. The pharmaceutics include emerging concepts, new theories and their practical applications in development and production of “Dosage forms” and now they are appropriately refer to as “ drug delivery systems”.

Biopharmaceutics is a major branch of pharmaceutical sciences. It concerns the relationship between the physical and chemical properties of a drug in a dosage form and the pharmacologic and toxicologic or clinical response observed after the administration. The study of biopharmaceutics has been extended beyond that of descriptive discipline by the development of pharmacokinetics, which concerns the study and characterization of the time course of therapeutics and adverse effects of drugs.

Pharmaco-Kinetics involves the application of mathematics and biochemistry in a physiologic and pharmacologic context. The development of clinical pharmcokinetics is the culmination and logical outcome of advances in the area of pharmacokinetics, clinical pharmacology, toxicology, analytical chemistry, biopharmceutics and therapeutics. Simply stated, clinical pharmacokinetics is a health science that deals with application of pharmacokinetics to the safe and effective therapeutic management of the individual patient