Pharmacology is the study of drugs, their sources, uses, mechanism of actions, nature and properties. It is the study of chemical compounds, medicated drugs, and their interaction with living systems, from tiny molecules to cells, to tissues and whole organisms in order to produce a certain effect. Pharmacology is the science of drugs and their action of living organisms. Pharmacology is about studying all kings of drugs and their chemistry, also responsible for antibiotics, caffeine drinks and painkillers. It deals with chemical kinetics, dynamics of the drugs and the process of drug absorption in the body understanding the chemical changes happening in the process as these drugs alter the chemical composition of itself and the surrounding tissue it is acting on. This is mainly to understand why these changes are happening, allowing us to improve better drugs.