The destruction of the lower urinary tract by ketamine abuse: a new syndrome?

Regular recreational use of street-ketamine for its hallucinogenic effects is linked to a syndrome of cystitis and contracted bladder. In 59 young abusers in Hong Kong, all had moderate to severe lower urinary tract symptoms such as frequency, urgency, dysuria, and urge incontinence. Cystoscopy in 42 patients (71%) showed epithelial inflammation resembling chronic interstitial cystitis, and all 12 bladder biopsies had similar histological features. Urodynamic abnormalities were present in all 47 patients tested. Unilateral or bilateral hydronephrosis occurred in 30 patients (51%), and 8 had raised serum creatinine. Severe cases may lead to irreversible renal damage requiring dialysis.

Study at a glance

Abstract

OBJECTIVE: To report the clinical spectrum seen in young abusers of street-ketamine (regular recreational abusers of street-ketamine, for its hallucinogenic effects) in Hong Kong, presenting with significant lower urinary tract symptoms (LUTS) but with no evidence of bacterial infection. PATIENTS AND METHODS: We retrospectively analysed the clinical presentations, pelvic pain and urgency/frequency scores, video-urodynamic studies, cystoscopy findings, histological features of bladder biopsies and radiological findings of 59 ketamine abusers who were referred to the urology units of Princess Margaret and Tuen Mun Hospital, Hong Kong, from March 2000 to December 2007. RESULTS: Of the 59 patients, all had moderate to severe LUTS, i.e. frequency, urgency, dysuria, urge incontinence and occasionally painful haematuria. Forty-two (71%) patients had a cystoscopy that showed various degrees of epithelial inflammation similar to that seen in chronic interstitial cystitis. All of 12 available bladder biopsies had histological features resembling those of interstitial cystitis. Urodynamically, either detrusor overactivity or decreased bladder compliance with or without vesico-ureteric reflux was detected to some degree in all of 47 patients. Thirty patients (51%) had unilateral or bilateral hydronephrosis on renal ultrasonography, and four (7%) showed features suggestive of papillary necrosis on radiological imaging. Eight patients had a raised serum creatinine level. CONCLUSION: A syndrome of cystitis and contracted bladder can be associated with street-ketamine abuse. Secondary renal damage can occur in severe cases which might be irreversible, rendering patients dependent on dialysis. The present data do not establish the precise cause nor the incidence. Street-ketamine abuse is not only a drug problem, but might be associated with a serious urological condition causing a significant burden to healthcare resources.