Acute harms of ketamine use relate to vulnerability and injuries. Long term use can seriously harm both physical and mental health, diminishing quality of life, affecting personal relationships, and impairing academic or professional performance.9 Ketamine induced uropathy from ulceration and thickening of the bladder is a common and serious complication. In the UK, 27% of regular ketamine users report at least one urological symptom—dysuria, frequency, incontinence, haematuria, or retention—with severity correlated with dose and frequency of use.10 Treatment requires abstinence.11 If abstinence is not achieved, irreversible bladder and kidney damage can occur, requiring urinary tract reconstruction. Long term ketamine use is also associated with “K cramps”—severe abdominal pain. This may be related to liver disease that is similar to primary sclerosing cholangitis but less inflammatory and progressive.12 Acute harms of ketamine use relate to vulnerability and injuries. Long term use can seriously harm both physical and mental health, diminishing quality of life, affecting personal relationships, and impairing academic or professional performance.9 Ketamine induced uropathy from ulceration and thickening of the bladder is a common and serious complication. In the UK, 27% of regular ketamine users report at least one urological symptom—dysuria, frequency, incontinence, haematuria, or retention—with severity correlated with dose and frequency of use.10 Treatment requires abstinence.11 If abstinence is not achieved, irreversible bladder and kidney damage can occur, requiring urinary tract reconstruction. Long term ketamine use is also associated with “K cramps”—severe abdominal pain. This may be related to liver disease that is similar to primary sclerosing cholangitis but less inflammatory and progressive.12 — Non-prescribed ketamine use is rising in the UK – https://doi.org/10.1136/bmj.r1167

Yikes.

Update 07.05.25 – https://www.bbc.com/news/articles/c70r1xdyy59o