Pharmacology is the practice of designing drugs that cure or prevent disease as well as studying its effects and effectiveness. The pharmaceutical industry is ever-growing and more and more methods are being discovered to make effective drugs available. Newer medicines that are engineered in the laboratory can reduce the rehabilitation period as well as chances of relapse. This book is compiled in such a manner that it will provide in-depth knowledge about the theory and practice of pharmacology. From theories to research to practical applications, case studies related to all contemporary topics of relevance to this field have been included in this text. It will provide comprehensive knowledge to the readers. This text will be relevant to students and researchers alike in the fields of surgery, pharmacotherapy and pharmaceutical medicine.