What Is a K-Hole? Effects, Duration, Dangers and What to Do

A K-hole is a state of deep dissociation that ketamine can produce, in which a person loses contact with their body, their surroundings and their own sense of control. Inside a ketamine hole, a person's safety depends heavily on whoever is nearby, especially when alcohol or other depressants are also involved. Below, you'll find what the state feels like, how long it lasts, which signs call for 911 and what repeated episodes can mean. If someone near you is unresponsive or struggling to breathe right now, call 911 before reading further.

What Is a K-Hole, and What Does Ketamine Do to the Brain?

Health Canada classifies ketamine as a fast-acting anesthetic for human and veterinary surgery. Its public guidance describes the K-hole as a sense of the mind splitting off from the body. As a dissociative drug, ketamine blocks the nerve messages that tell the brain about pain, the property that makes it an anesthetic. It also changes how a person experiences sight and sound.

Part of the answer to what a K-hole is comes from the DEA's list of ketamine slang. That list separates "K-land," a mellow and colourful state, from the K-hole, an out-of-body, near-death experience. Street names for the drug itself include special K, kit kat and vitamin K, and slang for the state has also produced verb forms.

Other names for it include K-holing and being K-holed.

People who reach this state again and again may be showing early signs of ketamine addiction, a pattern the final section of this article returns to.

What Does a K-Hole Feel Like?

Health Canada's list of short-term mental effects ends with the K-hole itself. The items above it show what a K-hole experience can involve, from weightlessness or an inability to move to a drunken, dizzy feeling, sleepiness, confusion and poor coordination. Hallucinations or vivid dreams may also appear, which the agency warns can be intense and terrifying. To that list, the DEA adds a feeling of detachment and lost control. Because Health Canada also lists being unable to speak, a person in a K-hole may have no way to tell friends they feel frightened, sick or short of breath.

Once ketamine wears off, people may feel anxious and depressed. Some cannot remember what happened during the hours they spent under its influence. Low mood or anxiety that returns after each use deserves attention in its own right, since specialized mental health and addiction care treats both conditions at the same time.

How Long Does a K-Hole Last?

Ketamine acts fast, with Health Canada placing the start of its effects within minutes. According to the DEA, the hallucinatory stretch lasts roughly 30 to 60 minutes. Researchers at the University of Sydney's Matilda Centre put the wider effects of ketamine at a couple of hours.

The opening minutes of a K-hole carry a cardiovascular danger that nobody nearby can see. Heart rate and blood pressure rise a couple of minutes after the drug is taken, then ease gradually over the next 10 to 20 minutes. Health Canada connects that increase to stroke, accidents and heart attack.

None of these timeframes allows for alcohol or other drugs taken alongside ketamine. For that reason, what a friend or family member can see says more about the person's condition than the time since they used.

Which K-Hole Symptoms Can Other People See?

The outward K-hole symptoms are what a friend or family member has to work with. Between them, the DEA and Health Canada list these physical signs.

• Rapid, involuntary eye movements and dilated pupils
• Drooling, watery eyes and stiff muscles
• Nausea, with or without vomiting
• Numbness and blurred vision
• Little or no reaction to people, touch or pain

Difficulty breathing and loss of consciousness also appear on Health Canada's list of physical effects. Either one calls 911 right away.

How Dangerous Is a Ketamine K-Hole?

Non-medical ketamine use is never risk-free, and much of the danger inside a ketamine K-hole comes from the person's lost ability to protect themselves. Ketamine can cause nausea and vomiting, so Health Canada warns that eating or drinking beforehand raises the risk of choking on vomit. The same guidance links reduced sensitivity to pain with injuries. Ketamine's effects can also make it hard to resist sexual assault, according to the same source.

Because ketamine itself depresses the central nervous system, Health Canada warns that combining it with alcohol, opioids or other depressants can slow or stop breathing. Driving becomes dangerous under the same combination. In US emergency department data from 2011, 71.5% of ketamine-related visits also involved alcohol. Other drugs turn up as well, since the DEA reports ketamine both on its own and combined with MDMA, amphetamine, methamphetamine or cocaine. Nobody helping a person in a K-hole can assume ketamine was the only drug involved.

Emergency teams also watch for seizures and rhabdomyolysis, a breakdown of muscle tissue. For people who inject, shared needles and syringes can spread HIV, hepatitis B and hepatitis C.

Can Repeated K-Holes Cause Lasting Harm?

Beyond the risks of a single night, a review of ketamine's physical, psychological and social harms identified ulcerative cystitis, a painful inflammation of the bladder lining, as one of the main physical harms. The authors linked it above all to chronic, frequent use. A UK survey put numbers on that link. Of 3,806 people who completed it, 1,285 had used ketamine in the previous year. Among those recent users of the drug, 26.6% described urinary symptoms that tracked both the amount and the frequency of their use. Health Canada lists bladder inflammation, painful or urgent urination and incontinence as common problems for people who use ketamine regularly.

Thinking suffers with frequent, daily use too, with the strongest evidence pointing to deficits in working memory and episodic memory. Those two systems hold information in mind and record personal events. The review's authors add that the deficits can show up in schoolwork and job performance. They can also make addiction problems worse.

In the UK survey, 17% of people who had recently used ketamine were found to be dependent on it. Many people who use it frequently report trying to stop and failing, according to the review. Our overview of ketamine addiction treatment in Canada sets out what evidence-based care for that pattern involves.

What Should You Do If Someone Is in a K-Hole?

Each step below targets a danger described earlier, and none of them call for medical training.

1. Stay with the person. A sober adult should remain close until the effects have clearly worn off.
2. Make the space safe. Move them away from stairs, water, traffic and hard edges. Clear glass or sharp objects from their reach.
3. Use the recovery position if they stop responding. British Red Cross first aid guidance places a person who is unresponsive and breathing on their side so the airway stays open.
4. Give nothing by mouth. Offer no food, water, coffee, medication or other substances. Do not try to make the person vomit.
5. Keep a phone within reach. Check their breathing and response at regular intervals against the list below.

Signs That Mean Calling 911 Right Away

• Slow, noisy, irregular or gasping breathing
• No response to their name or to touch
• A seizure
• Vomiting in a person who is not fully awake
• Any known mix of ketamine with alcohol, opioids or other depressants

In an unresponsive person, noisy, irregular or gasping breathing usually points to a problem with the heart and lungs. The British Red Cross advises treating that person as if they are not breathing. Calling for emergency help after witnessing an overdose brings some legal protection under the Good Samaritan Drug Overdose Act. Paramedics will want to know what the person took, when and with what else.

Once the person is sober and safe, a calm conversation about what happened can follow. Families who have tried that talk before without success can bring in a team trained in professional intervention.

What Does It Mean If You Keep Ending Up in a K-Hole?

Reaching a K-hole again and again points to regular ketamine use. Health Canada warns that regular use can lead to tolerance, where a person needs more and more of the drug to feel the same effects. After frequent use, stopping abruptly can bring on withdrawal, with craving, sweating and headaches among the listed symptoms.

If you notice these signs in yourself, talking with someone is a reasonable next step. A family doctor, a counsellor or a confidential call to a treatment centre are all places to start.

For people whose use has reached that point, inpatient rehab offers withdrawal under 24/7 nursing supervision. Individual and group counselling take place in a setting without access to ketamine, with time to build coping skills before returning home. Families can take part in that work as well.

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Why the Bladder and the Ketamine Belong in One Conversation

The researchers behind the ketamine harms review call for urologists and addiction specialists to coordinate care for people with ketamine-related bladder damage. Raising urinary symptoms and ketamine use at the same appointment gives a care team the full information that coordination depends on.

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