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Ketamine (Ketalar) is a dissociative general anesthetic that has been available by prescription in the U.S. since the 1970s for human and veterinary uses. It has also been used for pain control in burn therapy, battlefield injuries, and in children who cannot use other anesthetics due to side effects or allergies.
Noun. 1. ketamine-a general anesthetic and tranquilizer (not a barbiturate) that is administered intravenously or intramuscularly; used mainly by veterinarians or for minor surgery with geriatric or pediatric patients; taken in large doses it causes hallucinations similar to those associated with the use of PCP.