This textbook "Pharmaceutical Biotechnology" has been designed for undergraduate, postgraduate, medical, biochemistry, biotechnology and those students opting pharmacology biotechnology as a new subject. It provides a complete, authoritative, current and readable material for the students. It also offers special features that make it useful to house officers and practicing clinicians. More emphasis has been given on discussion of drug groups and prototypes rather than offering repetitive detail about individual drugs. Selection of the subject matter and the order of its presentation are based on the accumulated experience of teaching this material to thousands of medical, pharmacy, dental, nursing and other health science students.