A survey for ketamine abuse and its relation to the lower urinary tract symptoms in Taiwan.

We aimed to explore the correlation between ketamine abuse and lower urinary tract symptoms (LUTS) and epidemiology of ketamine cystitis. Questionnaire records of ketamine abusers, such as sex, age, and details of using ketamine, including consumption method, amount, duration of ketamine use, and LUTS, were obtained from two private rehabilitation centers. We analyzed these factors and established a severity forecasting module. One hundred and six ketamine abusers completed the questionnaires. LUTS showed an onset time of 24.67 ± 26.36 months among ketamine abusers. Overactive bladder symptom score, international prostate symptom score-storage, interstitial cystitis symptom index, interstitial cystitis problem index, and visual analogue scale score were 5.25 ± 4.43, 5.95 ± 5.72, 10.96 ± 6.66, 9.73 ± 5.82, and 2.55 ± 3.18, respectively. All symptom scores were positively correlated with the duration of ketamine abuse. Ketamine snorting was significantly correlated with all symptom scores compared to smoking. Hydrodistention, intravesical hyaluronic acid instillation, intravesical injection with botulinum toxin, and hyperbaric-oxygen therapy showed better effect than oral treatment. Ketamine can induce severe storage symptoms, such as frequency or nocturia depending on the duration of abuse. Ketamine snorting may cause worse LUTS than smoking. Combining ketamine and other substances may exacerbate LUTS. Intravesical therapy may lead to better outcomes than oral treatment.