The possible role of opiates in women with chronic urinary retention: observations from a prospective clinical study


PURPOSE: Urinary retention in women often presents a diagnostic difficulty, and the etiology may remain unidentified even after excluding structural and neurological causes. We evaluated a group of women referred to a specialist center with unexplained urinary retention. MATERIALS AND METHODS: A total of 61 consecutive women with complete urinary retention were evaluated. Urological and neurological investigations locally had failed to identify a cause. Urethral pressure profile, sphincter volume measurement and in some cases urethral sphincter electromyography were performed to diagnose a primary disorder of sphincter relaxation (Fowler's syndrome). RESULTS: Mean patient age was 39 years (range 18 to 88). Following investigations, a probable etiology was identified in 25 (41%) women, the most common being Fowler's syndrome. Of the women 24 (39%) were being treated with opiates for various pain syndromes and in 13 no other cause of retention was identified. Opiates could be discontinued in only 2 patients, and both demonstrated improved sensations and voiding. CONCLUSIONS: The cause of urinary retention may remain unknown in spite of extensive investigations. Young women regularly using prescription opiates for various undiagnosed pain syndromes present a challenging clinical problem and this study suggests that iatrogenic causes should be considered if voiding difficulties emerge. An association between opiate use and constipation is well-known and, although urinary retention is a listed adverse event, it appears to be often overlooked in clinical practice. It is hypothesized that Fowler's syndrome is due to an up-regulation of spinal cord enkephalins and that exogenous opiates may compound any functional abnormalities predisposing young women to urinary retention

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This paper was published in ZORA.

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