When the first edition of Pain: Current Understanding, Emerging Therapies, and Novel Approaches to Drug Discovery was written the format was formatted as an encyclopedic reference manual - often times bulky and difficult to navigate. However, this second edition is written as a more practical reference tool presenting only the most essential information, and focusing on the current approaches in pain management for understanding and treating symptoms of pain. Developed as a true reference manual for scientists and practicing physicians working in pain management, this text will address the rapidly expanding specialty