A Textbook of Clinical Pharmacology and Therapeutics, 5ed (A Hodder Arnold Publication) 5th Edition is a great resource for those looking to enter the field of clinical pharmacology. The book provides an overview of the field, its history, A Textbook Of Clinical Pharmacology And Therapeutics, 5ed (A Hodder Arnold Publication) 5th Edition and its current state. It also covers topics such as drug development, clinical trials, and regulatory affairs. The fifth edition is the most recent edition of the book, and it includes new information on drug safety and efficacy.