The best drug in the treatment of any disease is one that immediately meets the need for the drug in the blood (or site of action) and remains constant throughout the recovery period. This can be done by administering the dosage at a certain dose and a certain frequency. Therefore, a drug can be used in different ways for different types of drugs. Information about various drugs has changed and evolved rapidly over the past few years with the advent of new technologies. Recently, new ideas and government regulations regarding bioavailability, bioequivalence and validation are affecting the development, modifications and production of drug formulations. The physical and chemical characteristics of drug have a significant impact on safeness and compitancy. Poor physical properties often lead to difficulties in establishing dose-response relationships (SARs) and a lack of compitancy in clinical trials. This could lead to further changes in capacity throughout the development process, higher medical costs, and worst of all, the abandonment of late diagnostic tests. Knowing the basic physical and chemical characteristics helps to isolate and eliminate probes so that molecular defects can be modified or corrected at the design stage. The purpose of this chapter is to present the facts and details on the production of quantitative data, the important physical properties of selected molecules and how these properties can be analyzed and incorporated into research, the visualization and development of the final dose.