Addiction & Substances

Ketamine Addiction: Signs, Harms and Treatment

By Craig Bilton, Founder & Clinical Director · Updated 28 August 2026 · 23 min read

Ketamine is a dissociative anaesthetic with legitimate medical uses, but non-medical use can become compulsive and cause serious harm. A person may lose control of how often they use, return to ketamine despite trying to stop, or continue while urinary pain, memory problems, low mood, debt or disrupted daily life become worse.

The most important message is to seek help early. Ketamine can damage the bladder and wider urinary tract, and longer-term use is also associated with severe abdominal pain, liver and bile-duct problems, cognitive effects and accidents. Some damage improves after ketamine stops; some may persist or become irreversible. Urinary or abdominal symptoms should not be hidden or treated with more ketamine.

This guide is educational and cannot diagnose addiction, assess bladder or kidney damage, or recommend an individual withdrawal plan. If someone is unconscious, has stopped breathing, is struggling to breathe, has a seizure or may have been poisoned, call 999 or go to A&E. If you are unsure whether something taken may be harmful, call NHS 111.

The concise answer

Ketamine addiction is a pattern of impaired control, strong desire or craving, and continued use despite harm. It is not defined by one dose, frequency or route. Warning signs can include using more often than intended, unsuccessful attempts to cut down, organising life around ketamine, and continuing despite urinary pain, blood in the urine, abdominal symptoms, mental-health effects or major disruption.

Treatment starts with an honest assessment of use, other substances, physical symptoms, mental health and safety. There is no well-established medicine specifically licensed for ketamine addiction, and the evidence for medication approaches is very limited. Care therefore usually combines support to stop ketamine, evidence-based psychosocial treatment, relapse planning and rapid medical investigation when urinary, kidney, abdominal or liver harm is suspected.

Table of contents

1. Key takeaways
2. What ketamine is
3. Signs of ketamine addiction
4. Main health harms
5. Ketamine bladder damage
6. Urgent warning signs
7. Withdrawal and cravings
8. Assessment
9. Treatment options
10. Practical next steps
11. Frequently asked questions

Key takeaways

• Ketamine has medical uses, but non-medical use can lead to addiction and serious physical harm. Prescribed or clinically administered ketamine should be reviewed with the responsible clinician rather than changed independently.
• Addiction is identified through impaired control, craving, continued use despite harm and reduced functioning, not a single amount or frequency.
• Needing to urinate more often or urgently, waking at night to urinate, pain or burning, leakage, bladder pain and blood in the urine can be signs of ketamine-induced uropathy. Seek medical attention early.
• Ketamine-related harm can extend beyond the bladder to the upper urinary tract, kidneys, abdomen, liver and bile ducts. Chronic frequent use may also affect cognition and mental health.
• Acute ketamine effects can include poor coordination, hallucinations, agitation and reduced consciousness. Alcohol, opioids, benzodiazepines and other depressants can increase the risk of severe adverse effects.
• Withdrawal after heavy use may involve cravings, low mood, anxiety, irritability and sleep disturbance, but the evidence on its course and treatment is limited. Mental-health and suicide risk still require careful assessment.
• No specific medication has a strong evidence base for ketamine addiction. Treatment is usually psychosocial and recovery-focused, with coordinated medical care for physical complications.
• Stopping ketamine is central to protecting the urinary tract, but severe symptoms still need investigation and follow-up; stopping does not guarantee that established damage will fully reverse.

What is ketamine?

Ketamine is a dissociative anaesthetic. In healthcare it is used in anaesthesia and some pain settings. Ketamine or its related medicine esketamine may also be used in specialist psychiatric practice, although the indications, licensing, monitoring and NHS availability are specific and should not be confused with unsupervised use.

The drug alters perception and the sense of connection between mind, body and surroundings. Non-medical use may produce detachment, distorted time and space, reduced pain awareness, hallucinations and impaired coordination. At higher exposure, a person may become profoundly disconnected from reality or less responsive, sometimes described informally as entering a “K-hole”. That state can make it difficult to recognise injury, protect an airway, judge danger or give valid consent.

In the UK, ketamine remains a Class B controlled drug. Its legal classification does not determine whether someone deserves care: NHS guidance states that people needing help for a drug problem are entitled to treatment like anyone with another health problem.

Medical treatment is not the same as illicit use

Someone receiving ketamine or esketamine through a legitimate clinical service should be screened, monitored and given instructions about driving, medicines and follow-up. The 2026 Advisory Council on the Misuse of Drugs review concluded that addiction appears unlikely with recommended therapeutic doses in structured clinical care, while acknowledging that dependence and addiction are recognised with regular high-dose use.

If you are worried about a prescribed or clinic-administered treatment, speak to the responsible clinician. Do not miss appointments, obtain extra ketamine elsewhere or stop a long-standing specialist treatment solely because of information online. The clinician needs to review the indication, benefits, adverse effects, urinary symptoms, other substances and any difficulty controlling use.

What are the signs of ketamine addiction?

Not everyone who uses ketamine has an addiction. Frequency alone cannot diagnose it, and a person does not have to use every day before a pattern becomes serious. The central questions are whether control is becoming impaired, whether use is taking over important parts of life and whether it continues despite harm.

Possible signs include:

• using more ketamine, more often or for longer than intended
• repeated attempts to cut down or stop that do not last
• strong urges, preoccupation or feeling unable to manage a situation without ketamine
• needing substantial time to obtain, use or recover from it
• cancelling work, education, family commitments or social plans because of use or symptoms
• continuing despite urinary pain, frequent urination, blood in the urine, abdominal pain or medical advice
• using ketamine to numb low mood, anxiety, trauma, loneliness, pain or the consequences of ketamine itself
• increasing tolerance or finding that the previous amount produces less of the desired effect
• using in dangerous settings, driving while affected or being unable to remember what happened
• combining ketamine with alcohol, opioids, benzodiazepines or other drugs despite known risk
• financial problems, secrecy, conflict, unsafe supply arrangements or exploitation linked with obtaining ketamine
• returning to ketamine after serious injury, poisoning, hospital treatment or damage to relationships.

Several of these signs together should prompt an assessment. They may coexist with depression, anxiety, trauma, ADHD, chronic pain or another substance problem, but those needs do not make the ketamine pattern less important. They help explain what the treatment plan must address.

Our guide to addiction warning signs explains impaired control and continued use despite harm in more detail. Why addiction can persist despite a genuine wish to stop explores learning, reinforcement, craving and environmental cues without reducing the problem to willpower.

What harm can ketamine cause?

Risk varies with pattern and duration of use, what the product contains, route, other substances, health and environment. No amount can be declared universally safe. Powder sold as ketamine can vary greatly in purity and may contain other compounds, so appearance cannot confirm contents.

Acute intoxication and poisoning

The ACMD's 2026 review describes acute effects including agitation, poor coordination, hallucinations, abnormal movements and reduced consciousness. Severe cases may involve psychosis, changes in pulse or blood pressure, prolonged sedation, respiratory depression or convulsions.

Reduced pain awareness and judgement can add indirect harm. A person may fall, enter traffic, become hypothermic, choke after vomiting, sustain an injury they do not feel, or become unable to protect themselves. Dissociation can also affect capacity to give consent and increase vulnerability to assault or theft.

Alcohol, opioids, benzodiazepines and other depressants can increase adverse effects. The combination may be unpredictable even when ketamine alone is not usually associated with the same degree of respiratory depression as opioids. Do not assume that a familiar-looking powder is only ketamine or that another person will react in the same way.

The Office for National Statistics recorded ketamine on 60 drug-poisoning death certificates registered in England and Wales in 2024. This does not mean ketamine alone caused every death: more than half of drug-poisoning deaths involved more than one substance, specific-drug figures can be underestimates, and the data concern registrations rather than the date of death. The figure reinforces the importance of considering combinations and uncertain contents.

Cognition and mental health

Frequent, high-dose illicit use is associated with problems in attention, memory, planning and other cognitive functions. The evidence cannot answer every question about causation or reversibility, particularly because observational studies include different patterns and other substances. The ACMD concluded that the overall evidence suggests chronic frequent or high-dose use can impair cognitive functioning and that at least some effects may improve.

Ketamine can also interact with anxiety, depression, trauma, psychotic symptoms and sleep disruption. Some people use to escape distress and then experience a more unstable mood, shame, isolation or cognitive difficulty that makes stopping harder. Any assessment should ask directly about suicidal thoughts, self-neglect, paranoia and whether use occurs during emotional crises.

If mental health and ketamine use are affecting one another, our mental health and addiction guide explains why both need coordinated attention. Severe or complex co-occurring needs may require the more integrated approach described in our dual-diagnosis guide.

Abdominal, liver and bile-duct harm

Regular ketamine use can be associated with severe or recurrent abdominal pain, sometimes with vomiting, often called “K-cramps”. The label is informal and should not be used to self-diagnose or dismiss pain. Abdominal symptoms can have many causes, including urgent ones.

The ACMD also reports abnormal liver function, bile-duct dilatation and cholestatic injury in some regular users. Early abnormalities may improve after ketamine stops, while more prolonged exposure has been associated with fibrosis and severe complications. A clinician may need blood tests, imaging or specialist gastroenterology or liver input. Do not use more ketamine or non-prescribed opioids to suppress abdominal or bladder pain; this can deepen the addictive cycle and delay essential care.

Ketamine bladder and urinary-tract damage

Ketamine-induced uropathy can affect the bladder and the wider urinary system, including the ureters and kidneys. It may begin with symptoms that people feel embarrassed to disclose, but early honesty matters because continued exposure can be associated with scarring, reduced bladder capacity, obstruction and kidney damage.

Symptoms can include:

• needing to urinate more frequently during the day
• waking repeatedly at night to urinate
• sudden urgency that is hard to defer
• passing only small amounts
• leakage or incontinence
• burning or pain when urinating
• lower abdominal or bladder pain
• visible blood in the urine.

The 2026 ACMD review reports that about a quarter of people who use ketamine regularly have described at least one urinary symptom, with risk related to dose and frequency. That is a survey-based estimate, not a prediction for an individual. Occasional use does not guarantee protection, and absence of symptoms does not prove that no harm exists.

The British Association of Urological Surgeons consensus recommends a ketamine-specific and urological history, examination where appropriate, urine testing, baseline blood tests including kidney and liver measures, and renal-tract ultrasound. Other tests depend on symptoms and findings. This is why an online checklist cannot confirm “ketamine bladder”. Urinary infection, stones and other conditions may produce similar symptoms and also need treatment.

Stopping ketamine is the most important part of managing ketamine-induced uropathy, but it is not the only part. Specialist care may be needed for pain, bladder symptoms, upper-tract involvement or severe structural damage. Symptoms may improve after cessation, remain only partly improved or persist. In advanced cases, reconstructive procedures or urinary diversion may be considered by specialist teams.

Seek medical advice promptly for any new urinary symptom and tell the clinician about ketamine. Blood in the urine always deserves assessment. Do not wait until the pain is unbearable, and do not assume that drinking extra water, taking antibiotics left over from another illness or using more ketamine will treat the cause.

When to get urgent medical help

Call 999 or go to A&E if someone who has used ketamine or another unknown substance:

• is unconscious or cannot be woken
• has stopped breathing or has severe difficulty breathing
• has a seizure
• has collapsed, sustained a serious injury or is dangerously confused or agitated
• may have taken a poisonous substance or an unexpectedly strong or contaminated drug
• has tried to end their life or is at immediate risk of suicide or serious self-harm.

If the person is unconscious but breathing, put them in the recovery position if you know how, keep checking their breathing and follow the 999 call handler's instructions. Do not make them vomit or give them food or drink. Tell emergency staff what may have been taken and bring any packaging if it is safe.

Use NHS 111 for urgent advice when you are not sure whether something taken is harmful or you need medical help now but the situation is not clearly life-threatening. The online service is for England; the NHS provides links to the equivalent routes in Scotland, Wales and Northern Ireland.

Urinary or abdominal symptoms also need timely clinical assessment. Seek urgent same-day advice from a GP, NHS 111 or an urgent treatment service for visible blood in the urine, severe or worsening bladder or abdominal pain, vomiting, fever with urinary symptoms, new flank or kidney-area pain, difficulty passing urine or feeling systemically unwell. Call 999 if the person is collapsing, severely confused, unable to breathe or otherwise appears critically ill.

Ketamine withdrawal and cravings

People stopping frequent or heavy ketamine use may experience strong cravings, low mood, anxiety, agitation or irritability, sleep disturbance and difficulty concentrating. The 2026 ACMD review says symptoms after heavy use may last several days, while emphasising that evidence on managing ketamine withdrawal and dependence remains limited and low quality.

Ketamine withdrawal is not usually approached like alcohol or benzodiazepine withdrawal, where abrupt cessation can produce a well-established risk of seizures or delirium. That does not make the process trivial. Severe depression, suicidal thoughts, psychosis, multiple-drug dependence, an unsafe environment or inability to manage basic needs can make community stopping unsafe.

There is no validated internet detox timetable that can determine the right setting. A clinician or drug service should assess:

• the pattern, route and last use of ketamine
• cravings and previous attempts to stop
• alcohol, benzodiazepine, opioid, stimulant and other drug use
• urinary, abdominal, liver or other medical symptoms
• mood, psychosis, trauma, suicide risk and sleep
• pregnancy, age, physical conditions and prescribed medicines
• housing, safeguarding, support and access to follow-up.

If another substance can cause dangerous withdrawal, that may determine the medical plan even when ketamine is the main concern. The Addiction Detox in the UK guide explains why withdrawal risks must be assessed substance by substance.

What a ketamine assessment should cover

A good assessment is specific, non-judgemental and practical. It should not force a person to prove that they are “addicted enough” before their physical symptoms are investigated.

Expect questions about:

• Pattern and product: frequency, approximate amount, duration, route, last use, periods of escalation, source, uncertain contents and spending.
• Control and consequences: craving, unsuccessful attempts to stop, time spent using or recovering, work or education, relationships, finances, legal risk and daily functioning.
• Urinary health: frequency, urgency, night-time urination, pain, burning, blood, leakage, reduced volumes, infections, previous tests and changes over time.
• Other physical symptoms: abdominal pain, vomiting, appetite or weight change, yellowing of the skin or eyes, injuries, blackouts, sexual-health risks and injection-related concerns.
• Other substances and medicines: alcohol, opioids, benzodiazepines, stimulants, cannabis, prescribed medicines, supplements and painkillers used to manage symptoms.
• Mental health: mood, anxiety, trauma, dissociation, psychotic symptoms, cognition, self-harm, suicide risk and what function ketamine currently serves.
• Safety and context: driving, caring responsibilities, exploitation, consent, housing, storage, safeguarding and whether trusted support is available.
• Goals and strengths: stopping, reducing harm while care is arranged, protecting health, restoring routine, previous periods of change and what made them possible.

Physical assessment may include urine testing, kidney and liver blood tests, ultrasound and other urological investigations. Toxicology can sometimes support care, but the Orange Book states that testing is not required simply to validate a clear disclosure. A person's account should be met with clinical curiosity, not disbelief.

With consent, the GP, local drug service, urology, mental-health team and other specialists should share relevant information. Treating the bladder while ignoring ongoing ketamine use, or treating the addiction while delaying urinary investigation, risks fragmented care.

Ketamine addiction treatment in the UK

There is no single standard programme and no medication with a strong, established evidence base specifically for ketamine addiction. A 2024 systematic review found only very-low-quality evidence for pharmacological approaches, largely from case reports and small series. Medicines mentioned in research should not be interpreted as recommended self-treatment.

Treatment is therefore built from several coordinated components.

Support to stop ketamine and protect physical health

When ketamine-induced uropathy, abdominal or liver harm is suspected, stopping exposure is central to preventing progression. The plan must still be realistic: cravings, pain, mental distress and easy access can make a simple instruction to “just stop” ineffective.

A drug service can help create a stopping plan, monitor wellbeing, address other substances and coordinate medical care. Urology or other specialist services may investigate and treat complications. Pain must be managed carefully because using more ketamine or unprescribed opioids to suppress ketamine-related pain can worsen risk.

Psychosocial and recovery treatment

The NHS describes talking therapies such as cognitive behavioural therapy as part of drug treatment. Depending on the person and service, ketamine recovery may include:

• motivational work to build a personally meaningful reason for change
• cognitive behavioural strategies for cravings, triggers and high-risk situations
• contingency management or other structured reinforcement approaches where available
• relapse-prevention planning and rapid re-engagement after a lapse
• treatment for depression, anxiety, trauma, ADHD, psychosis or sleep problems
• practical help with debt, education, work, housing and relationships
• peer or mutual-aid support when the person finds it useful
• family involvement with consent and separate support for relatives
• a continuing-care plan after the initial period of stopping.

Evidence specific to ketamine remains limited, so treatment should use established addiction principles while measuring whether the plan is helping this person. Goals should include physical follow-up and functioning, not only a drug test.

Community, inpatient or residential care

Many people can receive drug treatment while living at home, alongside GP and specialist follow-up. More intensive or residential care may be appropriate when there is:

• severe addiction with repeated unsuccessful community treatment
• an environment where ketamine is constantly available or safety cannot be maintained
• serious depression, psychosis, suicide risk or self-neglect
• multiple-drug dependence or another medically risky withdrawal
• repeated poisoning, injury or inability to protect oneself while intoxicated
• complex urinary, kidney, abdominal or liver harm needing coordinated appointments
• significant safeguarding, exploitation or housing concerns.

Residential rehab should not be presented as a substitute for urology, emergency medicine or other specialist care. Treatment placement should verify how a provider coordinates physical-health investigation, mental-health risk, other substances and aftercare rather than relying on attractive accommodation.

IRN's online recovery programme may support suitable, medically stable adults with structure, cravings, coping and relapse prevention. It cannot investigate blood in the urine, treat ketamine-induced uropathy or replace urgent, GP or specialist care.

Young people and ketamine

Problematic ketamine use and urological harm increasingly affect adolescents and young adults. A young person should not be routed automatically into an adult-only pathway. Assessment needs developmentally appropriate drug treatment, paediatric or young-person medical input where necessary, mental-health and safeguarding review, and thoughtful family involvement.

If a child or young person has urinary symptoms or other physical harm, contact their GP or urgent service and disclose the ketamine use. Immediate danger still requires 999.

Harm reduction while waiting for care

There is no risk-free way to use illicit ketamine, and reducing harm is not the same as declaring use safe. While treatment or medical review is being arranged:

• do not mix ketamine with alcohol, opioids, benzodiazepines or other depressants
• do not drive, cycle, swim, use machinery or enter other dangerous environments while affected
• do not use more ketamine or unprescribed opioids to treat bladder or abdominal pain
• seek medical attention early for urinary or abdominal symptoms
• do not share snorting or injecting equipment; local drug services can provide blood-borne-virus testing and sterile supplies where relevant
• assume that unregulated powder may have unexpected purity or contents
• tell a trusted person what is happening and agree how emergency help will be called
• store substances away from children and vulnerable people while arranging safe disposal advice.

These steps do not replace treatment. If use is continuing despite severe pain, blood in the urine, repeated collapse or a clear wish to stop, that is evidence for more support rather than a reason for shame.

How to find ketamine help in the UK

GP and urgent medical care

A GP can assess symptoms, arrange blood or urine tests and refer to urology or other specialist services. Give a direct account of ketamine use, including route and pattern. Clinicians need this information to interpret urinary, kidney, abdominal and liver findings.

Use NHS 111 when medical advice is needed urgently and the situation is not clearly life-threatening. Use 999/A&E for poisoning, loss of consciousness, breathing difficulty, seizure or immediate danger.

Local drug and alcohol services

You can approach a local drug service directly or ask a GP to refer you. NHS guidance says treatment may include a keyworker, talking therapies, harm reduction, support groups and either community or more intensive care according to need. FRANK provides a service finder and helpline if you do not know the local route.

Private treatment

Private care may offer faster assessment or a more intensive setting, but it should not delay urgent NHS investigation. Ask who assesses urinary and liver symptoms, how other substances and mental-health risks are managed, how the service coordinates with NHS specialists, what happens out of hours and what continuing support follows discharge.

What to do today if you are concerned

1. Triage the immediate risk

Call 999 for loss of consciousness, stopped or severely impaired breathing, seizure, suspected serious poisoning or immediate suicide risk. Use same-day GP or NHS 111 advice for significant urinary or abdominal symptoms.

2. Write down the complete picture

Record the recent pattern, route, last use, other substances, urinary and abdominal symptoms, mental-health concerns, prescribed medicines and previous attempts to stop. Do not delay help because the amount is uncertain.

3. Contact both sides of the problem

Approach a GP or urgent medical service for physical symptoms and a local drug service for the addictive pattern. Ask them to coordinate rather than waiting for one problem to be fully resolved before addressing the other.

4. Remove avoidable danger

Do not drive while affected, mix depressants or use ketamine to suppress pain. Arrange trusted support and reduce access to the people, money or environments that make an unplanned return to use more likely.

5. Plan for the next craving, not only the next appointment

Decide who to call, where to go and what practical action to take when the urge rises. Keep medical follow-up even if urinary symptoms improve, and return quickly to support after a lapse rather than treating it as failure.

How families and friends can help

Choose a time when the person is not intoxicated. Describe specific observations, such as frequent toilet visits, visible pain, missed work, spending, memory changes or repeated promises to stop, without diagnosing or humiliating them. Ask what they have noticed and whether they will accept help arranging both a medical review and drug support.

Do not lend money for ketamine, cover up dangerous behaviour, drive with someone who is impaired or keep the problem secret when a child or vulnerable person is at risk. Do call 999 in an emergency even if the person worries about disclosure of illegal use.

Families may need their own advice on boundaries, safety and stress. The addiction support for families guide offers a structured starting point.

When professional support is needed

Professional assessment is appropriate when ketamine use is hard to control, cravings are strong, attempts to stop do not last, or health and daily life are being affected. It becomes especially important with urinary or abdominal symptoms, escalating use, other depressant drugs, repeated intoxication, cognitive change, depression, psychosis, suicide risk, pregnancy, safeguarding concerns or an unsafe home environment.

You do not need to wait for a diagnosis, a crisis or a particular daily amount. Early disclosure offers the best opportunity to protect health and build a workable recovery plan.