book covers both the basic knowledge of commonly used anesthetics and analgesics and practical use of these drugs to prevent farm animal pain caused by surgery and/or disease processes. We hope farm animal veterinarians find this book useful and practical for the anesthetic techniques and pain management aspect of their daily practice. There are few anesthetics and analgesics approved by the Food and Drug Administration. As consumers demand healthy and safe food products, it is imperative that farm animal veterinarians and producers are aware of the regulatory and legal guidelines of extralabel use of these drugs to ensure edible animal products are free of harmful pharmaceutical residues.