Quick answer: Signs of ketamine misuse include episodes of detachment or seeming “zoned out,” confusion and slurred speech, needing more to get the same effect, frequent use at parties or alone, bladder pain or frequent urination, small bags of white powder, and anxiety or low mood between uses. Ketamine can be mixed with other drugs, including fentanyl.
If someone is unresponsive, having trouble breathing or seizing, call 911. Give naloxone if opioids may be involved.
How we put this guide together
New York Center for Living treats young adults and professionals in Midtown Manhattan, where ketamine and other party drugs are part of the nightlife scene. This guide draws on established clinical understanding of ketamine’s effects. It’s meant to help people recognize misuse, not to diagnose.
Signs at a glance
| Type of sign | What you might notice |
| Behavioral | Detached, “zoned out,” unresponsive episodes |
| Cognitive | Confusion, memory problems, trouble concentrating |
| Physical | Slurred speech, poor coordination, nausea |
| Bladder | Pain, urgency, frequent urination, blood in urine |
| Mood | Anxiety or low mood between uses |
| Paraphernalia | Small bags of white powder, keys or bumpers for snorting |
1. Detachment and “zoning out”
Ketamine is a dissociative drug. People may seem detached from their surroundings or themselves, sometimes deeply unresponsive at higher doses, often called a “K-hole.”
2. Confusion and memory problems
Confusion, trouble following conversations and memory gaps during and after use are common. Frequent use can affect memory and concentration more lastingly.
3. Poor coordination and slurred speech
Ketamine affects movement and speech, raising the risk of falls and injuries, especially in crowded or unfamiliar places.
4. Needing more for the same effect
Tolerance can develop quickly with frequent use, leading people to use more often or in larger amounts.
5. Bladder problems
Regular ketamine use can damage the bladder, causing pain, urgency, frequent urination and sometimes blood in the urine. These symptoms are a serious warning sign and need medical attention.
6. Using alone or outside social settings
Using ketamine regularly on your own, rather than occasionally at events, often signals it has become a coping tool or dependence.
7. Anxiety and low mood between uses
Some people experience anxiety, low mood or irritability between uses, which can drive more frequent use.
8. Mixing with other substances
Ketamine is often used with alcohol or other drugs, which increases risks like slowed breathing and injury. Street ketamine may also be contaminated, including with fentanyl.
9. Medical ketamine isn’t the same
Ketamine and esketamine are used in medical settings for treatment-resistant depression, under clinical supervision. That’s different from recreational use, which carries real risks of dependence and physical harm.
New York Center for Living offers outpatient treatment for young adults and professionals, including those struggling with club and party drugs. Call (646) 692-0034 or learn about our young adult program.
FAQ
What are the signs someone is using ketamine?
Signs include detachment or zoning out, confusion, slurred speech, poor coordination, bladder pain or frequent urination, and small bags of white powder. Frequent use alone is a warning sign.
Is ketamine addictive?
Ketamine can lead to tolerance and compulsive use, and people can develop a substance use problem with it, particularly with frequent use.
What is a K-hole?
A K-hole is a state of intense dissociation from high doses of ketamine, in which a person may feel detached from their body and surroundings and be largely unresponsive.
Can ketamine damage your bladder?
Yes. Regular use can damage the bladder and urinary tract, causing pain, urgency and frequent urination. Anyone with these symptoms should see a doctor.
Is ketamine therapy the same as recreational ketamine?
No. Medical ketamine and esketamine are used under clinical supervision for specific conditions like treatment-resistant depression. Recreational use carries risks of dependence and physical harm.
