Ketamine bladder: symptoms, treatment and whether it can be reversed

Symptoms can look like a urine infection or other bladder conditions, which is one reason ketamine bladder can be missed if no one asks about ketamine. BAUS describes the signs people may notice, and says the damaged bladder cannot hold much pee and may hurt when it fills.

FRANK, the UK drug information service, describes the same pattern: serious bladder problems with an urgent and frequent need to pee, and in some people the wider urinary tract is affected and incontinence (uncontrolled peeing) develops.

• Pain in your tummy, your back, or when you pee.

• Peeing a lot, even at night.

• Rushing to the toilet, or leaking urine.

• Having no control of your bladder.

• Seeing blood, clots or bits in your urine.

• Smelly or cloudy pee that hurts when you pee.

• Feeling sick with a fever, which BAUS says could be a serious infection called sepsis.

The first and most important step is to stop using ketamine. BAUS is direct about this: treatments will not work unless you stop, and if you carry on they may only lessen some of the symptoms rather than make them better. Alder Hey Children's NHS Foundation Trust likewise describes treatment as "certainly not a quick fix".

If stopping does not settle things, BAUS lists what specialist teams can offer. The order below is the order the leaflet uses, and which of these applies to you depends on what the checks show.

• Checks for damage: blood tests and a scan to see whether the kidneys are healthy, and an examination of the bladder, often done under general anaesthetic, sometimes with a small sample (biopsy) to look for serious problems such as cancer.

• A urine sample to check for ketamine. BAUS says some treatments will not work if you have used ketamine in the past six months.

• Drinking more water or other non-alcoholic drinks and avoiding acidic drinks, which BAUS says can make peeing more comfortable.

• Medicines that help you pee less often and reduce the rush to the toilet, and medicines for pain, started at a low dose and raised slowly. BAUS says never to stop pain medicines suddenly and that your GP can help you come off them safely.

• Referral to a specialist pain team if pain remains a problem.

• Treatments to help the bladder heal: medicine placed directly into the bladder through a soft tube passed into the urethra. BAUS says some people learn to do this at home.

• Surgery if nothing else works: either making a new bladder from part of the bowel, or a stoma (urostomy or ileal conduit) that drains urine into a bag stuck to the tummy.

Ketamine was developed as an anaesthetic and is used in medicine for people and animals. FRANK says that when it is sold on the street it is a grainy white or brown crystalline powder, and that snorting is the most common way to take it in the UK.

Ketamine bladder is bladder damage from using ketamine. Alder Hey describes damage to the bladder wall including ulceration and fibrosis (scarring), which can cause chronic bladder pain and incontinence. BAUS explains it in plain terms: the damaged bladder becomes sore and stiff, cannot hold much pee and may hurt when it fills.

BAUS prefers the name ketamine urinary tract syndrome because the problem is not limited to the bladder. Ketamine can block the tubes that carry urine from the kidneys to the bladder, and BAUS also lists other harms, including liver damage, nose damage if you snort it, stomach pain and ulcers, and constipation.

It depends on how early use stops and how much damage has happened. BAUS says stopping ketamine can help the bladder heal, but that the damage can be permanent, which is why stopping early is best. Alder Hey says the effects can be irreversible and, in the worst cases, may mean removal of the bladder or kidney dialysis.

On timing, BAUS says it can take six months for symptoms to go away, while most people begin to notice improvements after a few weeks. There is no exact safe amount: BAUS says no one knows how much ketamine is too much, and that everyone is different.

Recovery is not only about the bladder. Alder Hey notes that ketamine can affect mental health as well as physical health, and that treatment includes support to stop using altogether.

FRANK says there are no physical withdrawal symptoms with ketamine, so addiction is sometimes called a psychological dependence, and that people who become addicted may keep using whether or not they are aware of the health risks. Drug treatment services help people stop.

BAUS suggests your GP is a good place to start, as they can refer you to a local drug service, and you can also contact a local drug service yourself or use the FRANK website. Its tips include making a list of reasons to stop, knowing your triggers, planning how to deal with cravings and avoiding people who use ketamine.

If you are still using, BAUS advises never using ketamine to ease bladder pain because it makes things worse, not using alone, not mixing it with alcohol or other drugs, and not having a bath while using, because of the risk of drowning.

See a GP if you use ketamine and have bladder symptoms that keep coming back. Do not wait for the damage to become severe, because early stopping gives the best chance of recovery.

• Blood in your pee: the NHS says to ask for an urgent GP appointment or get help from NHS 111, and notes that blood in the pee must be checked because it can be a sign of cancer.

• Feeling sick with a fever, or a high temperature with bladder or back pain: BAUS says this could be a serious infection called sepsis, and the NHS says to seek urgent help. Call 111, or 999 if you are very unwell.

• Tummy or back pain together with pain when you pee, or smelly, cloudy urine: BAUS lists these as signs of ketamine urinary tract syndrome, and a GP can check your kidneys and urine without delay.

Alder Hey opened what it calls the first NHS ketamine clinic for children and young people in the UK in 2025, in response to a significant rise in young people presenting with ketamine bladder. It says the clinic offers non-judgemental support and referral into community drug services where appropriate.

Alder Hey's advice for a child or young person known to be using ketamine is to direct them to the FRANK website. If they have persistent bladder symptoms, a medical professional can refer them to urology, and if they have no bladder symptoms but need help to stop, local community drug and alcohol services can signpost them.

Alder Hey quotes an anonymised 2023 survey of more than 13,000 secondary school pupils in England, which reported that 11% of 15-year-olds had been offered ketamine at some point.

Several bladder conditions cause similar symptoms, so a doctor will usually check for them too. The NHS table below is simplified, and only a clinician can say which applies to you.

On the NHS the usual route is through a GP, who can arrange kidney tests and a urine test and refer to urology, and who can link you to local drug and alcohol services. Some areas have specialist ketamine bladder clinics run by urology teams, and referral criteria vary, so ask your GP what exists locally.

Private urology and private substance-use services also exist. In either sector the same steps apply: stopping ketamine, checking the kidneys and bladder, and treating symptoms. Many treatments are only effective after you have stopped, so a private appointment does not change that.