Pharmaceutical biotechnology is a branch of biotechnology that focuses on the development and production of drugs using biological systems such as microorganisms, cells, and enzymes. It involves the use of genetic engineering techniques to modify living organisms for the production of therapeutic proteins, vaccines, and other pharmaceutical products. Pharmaceutical biotechnology is also concerned with the development of targeted drug delivery systems and the study of the pharmacokinetics and pharmacodynamics of biopharmaceuticals. Scientists in pharmaceutical biotechnology use various techniques, such as recombinant DNA technology, cell culture, and protein purification, to produce and study biopharmaceuticals