This highly illustrated volume will describe, through clear diagrams and concise text, how the most prescribed, as well as new medicines, work in the body for a broad range of diseases. By bringing this knowledge together in one place, we will seek to answer the question, 'What is the impact of the accelerating knowledge in biology, drug research and medical sciences on the development and approval of medicines for the treatment of a wide range of diseases'. Furthermore, information on how a successful drug works can make the case for a particular therapy and provide an informed dialog between a patient and physician, or a professor and a student, or a regulator and pharmaceutical scientist.