The Division of Urology of the Department of Surgery at CUHK analysed the urinary system data from the Government and found that the majority of young people with history of ketamine abuse had urinary bladder problems. The study results were published in the August 2011 issue of the Journal of Urology. 

This is the first-ever report proving the inverse relationship of drug abuse dosage and bladder functions, which can help people to understand the detrimental effects of drug abuse and enhance the motivation of the youth to quit drugs.