Ketamine is a dissociative anesthetic that has legitimate medical uses, including anesthesia and a prescription form related to ketamine used for treatment-resistant depression. At the same time, it is also misused recreationally for its hallucinogenic and dissociative effects, especially in party or club settings. People may use ketamine because it can distort sight and sound, create a sense of detachment from the body or surroundings, and produce sedation or euphoria.1
The effects of ketamine abuse can include impaired coordination, dangerous changes in awareness, loss of consciousness, and breathing problems in higher doses. Repeated misuse can also lead to tolerance, dependence, addiction, and serious physical and mental health complications over time.2 Learn more about ketamine’s short- and long-term effects below, or contact our Atlanta drug rehab center to begin treatment for ketamine addiction.
Short-Term Effects of Ketamine
Like many drugs, ketamine can cause side effects even when it is used in a medical setting. However, ketamine effects are often more unpredictable and more dangerous when the drug is misused, taken in high doses, or combined with other substances. Recreational ketamine may be snorted, smoked, or mixed into drinks, which can increase the risk of accidental overuse or contamination.1
The effects of ketamine abuse often involve both mental and physical symptoms. Some people experience the dissociative “high” they were seeking, while others become agitated, confused, nauseated, or unconscious. Because ketamine can impair judgment and coordination, it also raises the risk of falls, accidents, risky behavior, and assault.1
Common ketamine short-term effects may include2:
- Feeling relaxed
- Feeling detached from the body
- Lowered sensitivity to pain
- Hallucinations and confusion
- Anxiety and panic
- Increased heart rate and blood pressure
- Vomiting
In short, the effects of ketamine can shift quickly from intoxication to a medical emergency, especially if you take more than intended or you do not know exactly what you were sold.
Long-Term Effects of Ketamine Abuse
Repeated ketamine misuse can cause much more than short-lived intoxication. Over time, ketamine’s long-term effects may include tolerance, psychological dependence, compulsive use, and a growing risk of ketamine addiction. Some people begin taking larger and larger amounts to get the same dissociative effect, which can increase both overdose risk and long-term damage.1
The effects of ketamine addiction are not limited to the brain. Chronic misuse has been linked to significant urinary tract problems, cognitive difficulties, mood symptoms, and other medical complications. One of the best-known risks of ketamine is ketamine-associated cystitis or uropathy, which can cause severe bladder pain, urinary urgency, frequent urination, blood in urine, and, in some cases, damage to the upper urinary tract.3
Some of the long-term effects of ketamine use can include2:
- Flashbacks
- Poor sense of smell
- Financial, work, and social problems
- Ketamine bladder syndrome
- Dependence on ketamine
- Needing to use more ketamine to get the same effect
- Abnormal liver function
- Mood and personality changes
- Memory problems
These ketamine dangers are one reason that early intervention matters. The longer misuse continues, the more likely it becomes that you’ll need structured support to stop.
Other Risks of Ketamine Abuse
Beyond the direct effects of ketamine abuse, one of the biggest concerns is polysubstance use. Ketamine may be used alongside alcohol, benzodiazepines, opioids, cocaine, methamphetamine, or MDMA in party settings, which can make the drug much more dangerous. When ketamine is mixed with alcohol, opioids, or benzodiazepines, the combined sedating effects can increase the risk of extreme drowsiness, unconsciousness, slowed breathing, and overdose.4
Mixing ketamine with stimulant drugs like cocaine or methamphetamine creates a different set of risks. Your body may be pushed in competing directions, which can worsen confusion, agitation, risky behavior, and unpredictable intoxication.4,6 Even if you think you’re balancing out the effects, polysubstance use is associated with a higher overdose risk overall.6
This is why the risks of ketamine aren’t just about the ketamine itself. The context is important. If you’re dealing with alcohol, opioid, meth, or cocaine addiction, along with ketamine misuse, your treatment needs to address the full substance use pattern rather than just one drug in isolation.
Risks of Fentanyl-Laced Ketamine
Like many illicit drugs, ketamine bought on the street may not be pure. Overdoses from ketamine alone are rarely fatal.5 It can be mixed with other substances without the buyer’s knowledge, including fentanyl. That makes the dangers much more serious, as fentanyl is a powerful synthetic opioid and even a small amount can cause a fatal overdose.6
You may think you are only using ketamine and not expect opioid effects. If fentanyl is present, you can suddenly become very sleepy, stop responding, or develop slowed or stopped breathing.6 In situations like that, naloxone can be life-saving if opioids are involved, and emergency medical help should always be called immediately.
If you or a loved one uses illicit substances, it is important to understand that contamination is a real risk. Fentanyl test strips and carrying naloxone can reduce the risk of a fatal opioid-related overdose when fentanyl exposure is possible.
Ketamine Overdose Symptoms
A ketamine overdose can look different depending on how much was taken, what other substances were involved, and whether the drug was contaminated. Some people become severely confused and physically unsafe before they lose consciousness. Others may stop responding very quickly.
Possible ketamine overdose symptoms may include7:
- Extreme sedation, loss of consciousness, paralysis, or coma
- Nausea and/or vomiting
- Confusion, violence, or terrors related to hallucinations
- Chest pain, irregular heart rate, or heightened blood pressure
- Seizures
If you think someone is overdosing, call 911 right away. Stay with them until help arrives, and give naloxone if opioid exposure is possible or suspected. Even if you are not sure what they took, it’s safest to treat it like an emergency.
Ketamine Withdrawal Symptoms and Treatment
If you’ve developed dependence or ketamine addiction, you may experience ketamine withdrawal symptoms when you stop using or significantly cut back. Unlike alcohol or benzodiazepine withdrawal, ketamine withdrawal is typically described as more psychological than medically dangerous, but that does not mean that it is easy or harmless. You can experience intense cravings, mood symptoms, sleep disruption, and distress that can quickly lead to relapse.8
Ketamine withdrawal symptoms may include8:
- Agitation
- Anxiety
- Dysphoria
- Cravings
- Tremors
- Irritability
- Sleep disturbances
You may benefit from a supervised detox setting if you’re having severe withdrawal symptoms, when multiple substances are involved, or when you have co-occurring mental health concerns. That is especially true if ketamine is being used alongside alcohol, opioids, or benzodiazepines, as those substances can create additional withdrawal or overdose risks.
If you or a loved one is struggling, ketamine addiction treatment usually focuses on a safe clinical evaluation, support during early withdrawal, and ongoing addiction treatment to reduce relapse risk. Long-term recovery often requires more than simply stopping the drug for a few days. You’ll need structured care from a rehab program that addresses cravings, mental health symptoms, triggers, and the reasons you started using ketamine in the first place.
Ketamine Addiction Treatment in Atlanta, GA
If you or a loved one is struggling with the effects of ketamine addiction, help is available. At Empowered Recovery Center, our rehab admissions team provides personalized addiction treatment for ketamine misuse, polysubstance use, and co-occurring mental health concerns. We understand that no two cases look the same, especially when ketamine is mixed with alcohol, opioids, stimulants, or other drugs.
Our admissions team can work with you to help you understand your options, including the different levels of care available through our rehab programs, what type of addiction treatment may fit your needs, and how to get started with rehab admissions. We can also help you understand the cost of rehab, including options for paying for rehab or using insurance for rehab, and how to verify your insurance benefits before treatment begins.
If you have questions about ketamine addiction treatment, drug and alcohol rehab in Atlanta, or what to do next after noticing the effects of ketamine abuse, contact Empowered Recovery Center today. Our team can help you take the next step and find the right path forward.
References:
- Department of Justice/Drug Enforcement Administration. (Apr 2020). Ketamine. Retrieved April 4, 2026, from https://www.dea.gov/sites/default/files/2020-06/Ketamine-2020.pdf
- Alcohol and Drug Federation. (6 Jun 2025). Ketamine. Retrieved April 4, 2026, from https://adf.org.au/drug-facts/ketamine/
- Nazarko, L. Urology & Continence Care Today. (Apr 2026). Ketamine uropathy. Retrieved April 4, 2026, from https://www.ucc-today.com/journals/issue/launch-edition/article/ketamine-uropathy
- Lewandrowski, K.U. et. al. (Feb 2026). The Emerging Crisis in Non-Prescribed Ketamine Use: A Rapid Attenuation of Depression in Face of Abuse and “Chill-out” or Escapism Drug. Substance Use & Misuse (1)1-18. Retrieved April 4, 2026, from https://pubmed.ncbi.nlm.nih.gov/41622770/
- NYU Langone Health. (24 May 2023). Research Finds Major Increase in Seizures of Illegal Ketamine, Sparking Concerns About Risks of Use. Retrieved April 4, 2026, from https://nyulangone.org/news/research-finds-major-increase-seizures-illegal-ketamine-sparking-concerns-about-risks-use
- Centers for Disease Control. (7 Nov 2024). Notes from the Field: Ketamine Detection and Involvement in Drug Overdose Deaths — United States, July 2019–June 2023. Retrieved April 7, 2026, from https://www.cdc.gov/mmwr/volumes/73/wr/mm7344a4.htm
- Time2Act: Stop Opioid Misuse in Missouri. (n.d.). Ketamine Overdose Symptoms. Retrieved April 4, 2026, from https://time2actmissouri.com/naloxone/ketamine-overdose-symptoms
- Roxas, N. et. al. (16 Jul 2021). A Potential Case of Acute Ketamine Withdrawal: Clinical Implications for the Treatment of Refractory Depression. American Journal of Psychiatry. (178):7. Retrieved April 4, 2026, from https://psychiatryonline.org/doi/full/10.1176/appi.ajp.2020.20101480
Program Links
