Pharmacokinetics is the study of how drugs are processed in the body, and can be used to determine the rate and extent of drug absorption, distribution, metabolism, and excretion. It is an important discipline in drug development, allowing researchers to determine dosing regimens and measure drug interactions. Pharmacokinetics also plays an important role in designing therapeutic drug regimens and evaluating the safety of drugs, as well as detecting drug abuse and improvising drug delivery systems. By understanding the factors that affect drug absorption and metabolism, pharmacokinetics can help optimize drug therapy and improve patient outcomes.