Pharmaceutical Sciences is the branch of science which deals with the discovery and development of new drugs and therapies. Main categories includes: Drug Discovery and Design, Drug Delivery, Drug Action, Drug Analysis and Pharmacoeconomics. The pharmaceutical sciences area unit a gaggle of knowledge domain areas of study involved with the planning, action, delivery, disposition, inorganic, physical, organic chemistry and analytical biology medical specialty, statistics, chemometrics, arithmetic, physics, and chemical engineering, and applies their principles to the study of medicine. Analytical methods used in pharmaceutical science must be sufficiently accurate, specific, sensitive, selective and precise to conform to the regulatory requirements. Pharmaceutical chemistry are disciplines at the intersection of chemistry, especially synthetic organic chemistry, and pharmacology and various other biological specialties, where they are involved with design, chemical synthesis and development for market of pharmaceutical agents, or bio-active molecules. Compounds used as medicines are most often organic compounds, which are often divided into the broad classes of small organic molecule and "biologics" the latter of which are most often medicinal preparations of proteins.