Frequently referred to by street names like “special K,” “key,” and “K,” ketamine occupies a unique space as both a party drug comparable to ecstasy and a promising medical treatment for depression and substance abuse.
Because of this dual identity, the powerful anesthetic has drawn significant media attention in recent years.
It gained notoriety following its connection to the 2005 death of “Friends” star Matthew Perry. During the 2024 presidential race, tech billionaire Elon Musk publicly acknowledged using the substance to manage depression, though other reports questioned whether his usage crossed into misuse.
Additionally, a high-profile lawsuit filed by a former Cornell University student—accusing fraternity members of a 2024 gang assault—features multiple accounts of ketamine involvement by both the victim and the alleged perpetrators.
With recreational consumption on the rise alongside ongoing medical research into its therapeutic benefits, here is an overview of what the substance is, how it is applied, and the associated dangers.
What is ketamine?
Classified as a dissociative agent, the Drug Enforcement Administration notes that the drug creates a sense of detachment from one’s physical form, surroundings, and pain receptors. It can also induce hallucinations and sedation.
The Food and Drug Administration officially sanctions ketamine for anesthesia, as it effectively blocks pain signals and induces unconsciousness. In medical environments, it is typically delivered via intravenous drip or intramuscular injection.
Additionally, the FDA has authorized esketamine—a nasal spray derived from the compound—to treat severe depression under tightly managed protocols.
Under federal guidelines, ketamine falls under Schedule III, indicating a moderate-to-low potential for physical and psychological reliance, placing it below Schedule II substances like cocaine and methamphetamine in terms of abuse risk.
Outside of hospitals, it is widely recognized as a club or rave drug with alternative monikers like “super K,” “vitamin K,” and “ket.” Liquid forms may be injected, stirred into beverages, or dried into crystals and crushed into a powder for smoking or snorting. Tragically, it has also been exploited to facilitate sexual assaults.
While holding a valid prescription makes ketamine possession legal—including for off-label applications like treating post-traumatic stress disorder—retaining or distributing it without authorization remains strictly illegal.
What is ketamine used for in clinical settings?
In surgical settings, large doses are administered prior to and during procedures to induce drowsiness, encourage sleep, and render patients entirely unconscious.
Esketamine spray is utilized for treatment-resistant depression, offering rapid relief for individuals who have not responded to traditional therapies. Because of its potency, patients must remain in a clinic or hospital under observation for at least two hours following administration.
Ketamine therapy involves medical professionals prescribing controlled, low doses of the medication. Beyond the nasal spray, physicians sometimes provide off-label intravenous infusions for conditions such as chronic pain, obsessive-compulsive disorder, PTSD, and severe depression. An “off-label” designation simply means the medication lacks direct FDA approval for that specific condition.
Preliminary studies have also pointed toward short-term advantages in using the substance to combat substance use disorders, though further investigation is required.
How is ketamine misused or abused?
Recreational users seek out the substance for its ability to trigger out-of-body sensations or hallucinations lasting anywhere from half an hour to a few hours. These intense dissociative episodes are frequently described by users as entering a state of total oblivion, often dubbed a “k-hole.”
Misuse can result in sedation, physical immobility, memory loss, and distorted sensory perceptions. In severe cases, an overdose can cause complete unconsciousness and dangerously depressed breathing.
What are side effects and other risks of ketamine?
Adverse reactions commonly feature headaches, dizziness, nausea, blurred vision, cognitive fog, confusion, heightened anxiety, elevated blood pressure, and shortness of breath.
Regular consumption can lead to chemical dependency, with individuals possessing a history of substance abuse facing a significantly higher vulnerability.
Long-term misuse poses severe physical hazards, including impaired memory and focus, diminished liver and kidney performance, and “ketamine bladder syndrome”—a condition characterized by bladder shrinking, ulceration, and incontinence, as outlined by the Alcohol and Drug Foundation in Australia.
How does it mix with alcohol?
Because alcohol acts as a central nervous system depressant, combining it with ketamine amplifies the sedative properties of both substances, drastically elevating the likelihood of blacking out.
Even minor quantities can trigger intense nausea and vomiting, while heavier combinations heighten the danger of unconsciousness followed by the life-threatening risk of choking on vomit.
“Even on relatively small doses, you’re very detached from things,” Joseph Palamar, a ketamine researcher at New York University, noted to The New York Times. “You’re not as in touch with your emotions.” As quantities increase, verbal communication becomes exceedingly difficult, he added.