What does heavy ketamine use do to the bladder, and why are young people seeking treatment?
A Welsh charity went from two ketamine referrals in 2021 to 112 by October 2026, and doctors say the bladder is where the damage often shows first.
Heavy, repeated ketamine use can damage the bladder, causing a condition called ketamine-induced . This lesson describes the medicine and the public-health picture; it is not guidance on use.
Ketamine is a legal medicine, used for anaesthesia, depression and pain management, but it is also tightly controlled because it is used recreationally for its hallucinogenic and dissociative effects. The urinary harm is reported mainly in people who use large amounts routinely: 20 to 30% of frequent users have bladder complaints, ranging from to kidney failure. The typical symptoms are frequent urination, painful urination and urgency, sometimes with pain and blood in the urine. In damaged bladders the wall is thickened and the functional capacity can fall as low as 10 to 150 millilitres. Studies indicate that ketamine and its breakdown products act directly on the bladder lining, harming its cells and making its protective barrier more permeable. The first step in managing the condition is stopping ketamine.
Why is it in the news? On 19 October 2026 the BBC reported that Kaleidoscope, a drugs charity in Wales, had seen a huge rise in referrals to its detox and rehabilitation facility: two people in 2021 compared with 112 so far in 2026, mostly aged 18 to 24. One of them, Megan Harmes, first tried ketamine at 14, and ten years later bladder problems caused by the drug left her needing to wear pads. Dr Darren Quelch of the University of South Wales said harm from persistent use ranged from memory problems and chronic pain to bladder damage and kidney failure.
Ketamine referrals to one Welsh rehabilitation charity
people referred
| Referrals to Kaleidoscope | |
|---|---|
| 2021 | 2 people referred |
| 2026 (to 19 October) | 112 people referred |
What is still unknown is large. Quelch said that, while research continues, the scale of the problem and its longer-term health implications are unclear.
Quiz me
0/3
Recap
Heavy repeated ketamine use injures the bladder lining, and the first step in management is stopping the drug.
💡 A trick to remember it · Same molecule, two settings: a supervised anaesthetic in the operating theatre, a slow wear on the bladder's lining with heavy, repeated use.
Surprising fact · 20 to 30% of frequent users have bladder complaints, and the bladder's functional capacity can fall to as little as 10 to 150 millilitres.
Connects to
- 🧪 Does psilocybin treat depression? What the COMP360 trials found and why they are debated
- 💉 What is ketamine, and how did an anaesthetic become a depression treatment (esketamine, Spravato)?
- ⚖️ Talk therapy or medication for depression: what is the evidence fight actually about?
- ⚖️ Why can the same drug heal or harm depending on the amount?
- 🔥 Why does a cut turn red, hot and swollen?
Sources (4)
No source, no claim. Every fact in this lesson (16 claims) cites at least one of these.