Pharmaceutical chemistry is a field that involves the study of drug design, synthesis, and development. This field combines knowledge of various areas such as biochemistry, organic chemistry, and pharmacology to create new medications or improve the efficacy of existing drugs. Chemical compounds are synthesized and tested for their therapeutic action and possible side effects. This field is constantly developing new medications and improving existing ones in order to increase efficacy and minimize adverse effects.

A pharmacopeia is a reference book that contains information about pharmaceutical drugs and their composition, preparation, and use. Pharmacopeias are used by pharmacists, doctors, and other health professionals to prescribe and administer drugs. They include information about the physical and chemical properties of drugs, their indications and adverse effects, and how they are prepared and administered. Pharmacopeias also provide quality control and testing standards for the manufacturing of drugs to ensure their safety and effectiveness. Examples of pharmacopeias include the United States Pharmacopeia (USP), the European Pharmacopeia (EP), and the Japanese Pharmacopeia (JP).