Dr. Alejandro Casas-Alvarado is a Subject Professor at the veterinary pharmacology, toxicology and therapeutics, National Autonomous University of Mexico (UNAM), Mexico City, Mexico. He completed his Master’s Degree in Agricultural Sciences (Biological Sciences) and his Doctoral´s Degree.in Biological and Health Sciences from the Metropolitan Autonomous University. His research interests include Anesthesiology; Veterinary Science; Pain Assessment; Anaesthesiology; Small Animals; Physiologic Monitoring; Anesthesia; Pain Medicine; Pain Management; and Animal Behavior.