Ketamine is an anesthetic drug used in surgeries on both humans and animals. It is a dissociative drug that alters a person’s awareness of their surroundings, thoughts, and feelings. There are two types of hallucinogens, including:
Both types cause hallucinations or images and feelings that seem real even though they are not.
Most often, ketamine that is sold on the streets comes from veterinary offices. It is an injectable liquid that is evaporated into a white powder and is snorted or compressed into pills.
Street names for ketamine include:
In March 2019, the Food and Drug Administration approved the use of ketamine to treat major depression. Esketamine is a nasal spray prescribed by a doctor that reduces suicidal thoughts or actions and relieves other serious symptoms of depression. Racemic ketamine, the injected form used as an anesthetic, is also used off-label to treat depression. The dose used to treat depression is much lower than the dose used for anesthesia.
A study from 2018 found an estimated 5.6 million people (12 and older) were past-year users of hallucinogens. This is about 2 percent of the U.S. population.National Survey on Drug Use and Health (NSDUH)
Currently, more research is required to fully understand how ketamine works in the brain to produce hallucinations. Most likely, ketamine is binding to NMDA receptors in the brain. This binding generates more of a neurotransmitter, glutamate, in between neurons. Glutamate then activates AMPA receptors, leading to the release of other chemicals that allow neurons to communicate with one another.
The process above is called synaptogenesis, and can affect mood, cognition, and thought patterns. It is the likely culprit for the cause of hallucinations when taking ketamine.
People use ketamine for a variety of reasons, such as recreational and social purposes like having fun and coping with stress. Others may use it for its hallucinogenic properties to have “visions” of higher powers or achieve an enlightened sense of thinking and being.
If someone takes a high dose of ketamine, they may experience a “K-hole” or terrifying feelings of almost complete sensory detachment. This experience can be compared to a bad LSD trip and is a highly unpleasant sensation.
Due to its dissociative properties, the most common short-term side effect of ketamine is hallucinations. Other side effects include:
12 percent of patients who were administered ketamine as an anesthetic report experiencing:
When someone takes a high dose of ketamine, they can experience other, more serious side effects such as:
The long-term effects of dissociative drugs can last for a year or more after use stops. These include:
If someone takes too much ketamine at once, an overdose can occur and result in respiratory depression (difficulty breathing).
Ketamine is classified as a Schedule III controlled substance by the Drug Enforcement Administration. These drugs are defined as, “drugs with a moderate to low potential for physical and psychological dependence.”
However, it is possible to become addicted to ketamine due to long-term use. Physical and psychological dependence develop as a result of someone taking ketamine for an extended period of time. A person who uses ketamine daily will need to continue taking it to feel like themselves and function normally. Tolerance also develops over time, and individuals will often increase their dose in order to feel the same effects.
Addiction is characterized by a set of symptoms involving drug use and behavior. Someone who is addicted to ketamine might be unable to stop using it, may continue to do so despite knowing it is harmful, and may have cravings when not taking it. Symptoms of ketamine addiction include:
When drug use is stopped, the body experiences shock and exhibits symptoms of withdrawal. These symptoms can be uncomfortable and sometimes dangerous. The Food and Drug Administration states that withdrawal syndrome with psychotic features has been reported after prolonged ketamine use is discontinued.
There are currently no available FDA-approved medications to treat ketamine addiction. Behavioral therapy offered at qualified addiction centers can be an effective option for addressing addiction and the underlying causes.
Individuals who abuse Ketamine often do so in combination with other drugs, such as alcohol, which can become dangerous. This is referred to as polysubstance abuse. Treatment is also available to address polysubstance abuse.
Overcoming addiction to ketamine is difficult to do alone. Find treatment today.
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Drug Enforcement Administration. “Drug Scheduling.” DEA, https://www.dea.gov/drug-scheduling
Food and Drug Administration. “KETALAR (ketamine hydrochloride) injection.” FDA, https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/016812s040lbl.pdf
Meisner, Robert C. “Ketamine for major depression: New tool, new questions.” Harvard Medical School, May 2019, https://www.health.harvard.edu/blog/ketamine-for-major-depression-new-tool-new-questions-2019052216673
National Institute on Drug Abuse. “Common Hallucinogens and Dissociative Drugs.” NIDA, Feb. 2015, https://www.drugabuse.gov/publications/research-reports/hallucinogens-dissociative-drugs/what-are-dissociative-drugs
National Institute on Drug Abuse. “What are hallucinogens?” NIDA, Apr. 2019, https://www.drugabuse.gov/publications/drugfacts/hallucinogens
Substance Abuse and Mental Health Services Administration. “2018 National Survey on Drug Use and Health Annual National Report.” SAMHSA, Aug. 2019, https://www.samhsa.gov/data/sites/default/files/cbhsq-reports/NSDUHNationalFindingsReport2018/NSDUHNationalFindingsReport2018.pdf
Zorumski, Charles F., Izumi, Yukitoshi, Mennerick, Steven. “Ketamine: NMDA Receptors and Beyond.” The Journal of Neuroscience, vol. 36, no. 44, 2016, pp. 11158-11164. https://www.jneurosci.org/content/jneuro/36/44/11158.full.pdf