One of the clearest warning signs
Bladder and urinary problems are among the most common — and most serious — effects of regular ketamine use. The medical name is "ketamine uropathy," sometimes called "ketamine bladder." Symptoms include needing to wee very frequently, urgency, getting up in the night to wee, leaking, pain when weeing, blood in the urine, and bladder or lower abdominal pain.
Why you shouldn't wait
But the same research shows around half of people with symptoms don't seek help straight away, and symptoms often become much more apparent after about two years of use — by which point more damage may already be done. The earlier you act, the better the outcome is likely to be.
How the damage progresses
Urologists describe ketamine bladder damage in three broad stages:
Stage 1
Inflammation
The bladder is irritated and inflamed. At this stage, stopping ketamine (often alongside medication) can resolve things.
Stage 2
Structural changes
The bladder wall starts to change and shrink. Treatment becomes more involved.
Stage 3
Permanent damage
Lasting damage to the bladder, and sometimes the kidneys, which may need specialist surgery.
The takeaway isn't to frighten — it's that catching this early, at stage 1, gives the best chance of recovery.
It's not just the bladder
Heavy ketamine use can also affect the kidneys and liver, which is why it's worth asking your GP for liver and kidney function tests too, not just bladder checks. See our guide: What to say to your GP →
What to do
- Don't wait for it to get worse — see your GP and ask for a urology referral
- Be honest about ketamine use so you get the right assessment
- Ask for liver and kidney function tests alongside bladder checks
- The single biggest thing that helps is stopping ketamine — our Get Help pathways walk you through how
Information on this page is based on the British Association of Urological Surgeons (BAUS) 2024 consensus on the management of ketamine uropathy, published in BJU International.