Ketamine was initially used as an anesthetic agent. During the Vietnam War, it was used as a battlefield anesthetic because of its rapid onset of action, potent analgesic properties, high safety profile, and minimal side effects.
Today, it is a widely used anesthetic and analgesic in everyday surgical and emergency room procedures. Since 1985, The World Health Organization (WHO) has placed ketamine in the WHO Model List of Essential Medicines. The WHO also describes ketamine as a versatile medicine with a high level of safety used for anesthesia and analgesia in adults and children around the world.