Circadian rhythms are autonomous behavioral processes and critical predictive-adaptive strategy for survivalist exhibited by organisms in sync with the environmental stimuli. The circadian rhythmicity is associated with cellular transcriptional reprogramming and transcriptomic oscillations. The intracellular and intercellular interactions are required for cells to coordinate functionally in generating rhythms. Circadian, circannual, and other rhythmic changes in biological vulnerability and reaction of organisms to a great diversity of physical and chemical agents, including medications and foods, are rather common phenomena. A improved sympathetic of periodic and thus conventional changes in drug effects can be attained through concern complementary concepts of the chronopharmacokinetics of a drug , the rhythmic changes in vulnerability of goal biosystems to the drug, and the drug-integrated in general property. The rhythmic power of xenobiotic detoxification provides the molecular basis for the dosing time-dependence of drug toxicities and effectiveness. This data can in turn be used in civilizing or designing chronotherapeutics for the patients who suffer from several of the major human diseases. The chronopharmacokinetics of many drugs have been evaluated in the study and their roles presumably take part in metabolizing of liver enzymes and kidney function are focused, and the practical implications of chronopharmacokinetics, aiming both to advances in a quantitative behavior the metabolic fate of a drug and its efficiency, are to be discussed.