Ketamine
ket · K · special K · vitamin K
A surgical anesthetic that turned into a party drug, and a depression treatment. The part people rarely hear about is what regular use does to your bladder.
Educational only. Not medical advice. Information can change, so verify specifics with a current source. Dosing, interactions, and legality vary by location. In a crisis call 911 or 988.
higher bladder-disease risk with frequent use
of US adults used it in 2023, and climbing
Don't drive impaired, on anything. Alcohol, cannabis, stimulants, and the rest all slow your reaction time, judgment, and coordination, and stimulants can push you into aggressive, reckless driving. Using two at once stacks the impairment. It is illegal in all 50 states, and a DUI is the same charge whether it was alcohol or another drug. The bigger point: impaired driving kills people who had nothing to do with your night. If you feel different at all, you drive different. Hand over the keys, get a ride, or wait it out.
Ketamine is a dissociative anesthetic. It's used in surgery, and as the related drug esketamine it's FDA-approved for hard-to-treat depression. Recreationally, people usually snort it as a powder for the floaty, disconnected, dreamlike state it gives. Take enough and you hit a 'k-hole,' an intense detachment from your body and surroundings where you can barely move.
Use is climbing. Past-year ketamine use among US adults went from about 1.6% to 1.9% between 2021 and 2023, mostly among young adults. In nightlife it runs much higher, around 11% of people surveyed at EDM events in New York City.
Ketamine works differently from most party drugs. Instead of flooding dopamine, it blocks NMDA receptors and dampens glutamate, the brain's main signal for learning, memory, emotion, and pain. Quiet those signals and your sense of being connected to your body and the room falls away. That's the dissociation people are after.
Short term you get a floaty, dreamy detachment, distorted sight and sound, numbness, and loss of coordination. Higher doses bring sedation, immobility, and memory gaps. In a full k-hole you're basically anesthetized: awake-ish, but unable to move or protect yourself.
The big long-term risk is your bladder. Frequent use raises the risk of ketamine-induced cystitis by three to four times: pain, urgency, and needing to pee constantly. In heavy users it can progress to bladder scarring and even kidney failure. The damage tracks with how much you use, and stopping early usually reverses it.
Heavy, long-term use is also linked to memory problems, depression, anxiety, and recurring abdominal pain that regular users call 'k-cramps.'
Based on occasional use, roughly a gram a month at about $80. What you actually spend depends a lot on how often you use. Run your own in the savings calculator.
The most dangerous mistake is mixing. Ketamine plus other depressants (alcohol, GHB, benzos, opioids) stacks the sedation and can slow your breathing or leave you unconscious and choking. Because it also causes memory gaps and immobility, it has been used in sexual assaults, which is part of why an unattended or spiked drink is a real risk.
On its own, the biggest k-hole danger is the situation you're in. You can vomit while unable to move, which is a choking risk, or fall, or wander somewhere unsafe like water or traffic. Ketamine is also showing up more often in US overdose deaths, almost always alongside other drugs.
- Never mix ketamine with other depressants: alcohol, GHB, benzos like Xanax, or opioids. Stacked sedation is what stops people from breathing.
- Start low and wait. Ketamine is potent and the comeup is quick, so people redose straight into a k-hole. Give each dose time to land before adding more.
- Stay out of risky spots while dosing. No water, balconies, or stairs. If you slip into a k-hole you may not be able to move or react.
- Look after your bladder. Pain when you pee, urgency, or blood in your urine is an early warning. Cut back or stop and see a doctor, since catching it early usually reverses the damage.
- Don't use alone. If someone is deeply under and vomiting, roll them onto their side and stay with them. Call 911 if they can't be roused or their breathing is slow.
- Watch your drink. Ketamine is sedating and causes memory gaps, and it has been used to spike drinks. Keep yours with you and look out for your friends.
W.I.R.E. is an educational harm-reduction resource, not a substitute for a doctor or crisis professional. In an emergency call 911. For free, confidential help anytime, call or text 988 (Suicide & Crisis Lifeline) or 1-800-662-4357 (SAMHSA).
We work to cite and update every claim, but we cannot guarantee it is complete or current. Verify anything you act on with an authoritative source, especially dosing, drug interactions, and legality, which change over time and vary by location.
LAST FACT-CHECKED · 2026-06-21