Ketamine has one of the most unusual journeys in modern medicine.
Originally synthesized in 1962 as a safer anesthetic alternative, ketamine gained attention for providing effective anesthesia with relatively preserved respiratory function compared to other agents.
Battlefield Medicine
During the Vietnam War, it was widely used in battlefield settings due to its rapid onset, safety in trauma, and minimal respiratory depression, making it highly valuable in emergency care.
The Rise of “Special K”
Later, ketamine entered recreational and club culture under the name “Special K.” Its dissociative and hallucinogenic effects led to misuse, which has been associated with dependence, cognitive impairment, and urinary tract toxicity with chronic use.
A Psychiatric Resurgence
Despite its controversial history, research later revealed its rapid-acting antidepressant effects, particularly in treatment-resistant depression and acute suicidal ideation.
Off-label and clinical use
Ketamine is widely used in emergency medicine for rapid sequence intubation and procedural sedation, as well as for acute pain management in trauma and other emergency conditions. These are established clinical uses in hospital practice rather than off-label applications.
Off-label and emerging uses of ketamine include the management of treatment-resistant depression, acute suicidal ideation, and refractory status epilepticus. In 2019, the FDA approved esketamine nasal spray for treatment-resistant depression, marking the first formal regulatory approval in this therapeutic area.
Current Medical Uses of Ketamine
Anesthesia and procedural sedation
Emergency trauma care
Treatment-resistant depression (and esketamine approval)
Acute and chronic pain management
Ketamine’s journey highlights how a single drug can evolve dramatically in its medical role as scientific understanding advances.
MBH/PS