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Um and Kim: Efficacy and Tolerability of Extended-release Oxybutynin in Children with a Neurogenic Bladder
Original Article
Korean Journal of Urology

Korean Journal of Urology 2007; 48(10): 1064-1068.

Published online: 31 October 2007

DOI: https://doi.org/10.4111/kju.2007.48.10.1064

Efficacy and Tolerability of Extended-release Oxybutynin in Children with a Neurogenic Bladder

Jin Mo Um, Kwang Myung Kim

Department of Urology, Seoul National University College of Medicine, Seoul, Korea.

Corresponding author (kwang@plaza.snu.ac.kr)

Received 22 June 2007       Accepted 29 August 2007

Copyright © 2007 The Korean Urological Association

Abstract

Purpose

The aim of this study was to investigate the efficacy and tolerability of extended-release oxybutynin (oxybutynin ER) in children with a neurogenic bladder.

Materials and Methods

Fifty-four patients (21 myelomeningocele and 33 lipomyelomeningocele) with a neurogenic bladder were enrolled in the study. We reviewed the medical records and performed a telephone interview. The treatments were changed from immediate-release oxybutynin (oxybutynin IR) or other anticholinergics to oxybutynin ER from August to December 2006. The mean age of the study patients was 11.1 years (range 4 to 18 years) and the mean body weight was 37.9kg (range 16.2 to 72.0kg). All patients were asked about the effectiveness, side effects and compliance with the medication. The number of voids, volume of urine per void or clean intermittent catheterization (CIC) and number of incontinence episodes were also evaluated.

Results

The mean duration of oxybutynin ER treatment was 16.3 weeks (range 7-25 weeks). Twenty-six patients (48.1%) responded they had improvement in voiding symptoms. Among the patients, there was a significant reduction in the number of incontinence episodes (from 3.3 to 1.3, p<0.001) with the change in medications. The number of voids or CIC per 24 hours and the maximum volume of urine per void or CIC did not show a significant change. Another twenty-eight patients (51.9%) responded that the improvements were maintained. Among these patients, there were no significant changes of the medications. Only five patients (9.3%) changed their medication because of the side effects.

Conclusions

The results of this study showed that the extended-release oxybutynin was effective and well tolerated in children with a neurogenic bladder.

Keywords: Oxybutynin, Children, Neurogenic bladder

Figures and Tables

Fig. 1
The efficacy of extended-release oxybutynin. In this group, the patients said they experienced improvement in efficacy after the medication was changed from other anticholinergics to the extended-release oxybutynin (p>0.05 except incontinence).
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Fig. 2
The efficacy of extended-release oxybutynin. In this group, the patients said they experienced maintenance of the improved efficacy after the medication change from other anticholinergics to the extended-release oxybutynin (p>0.05).
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Fig. 3
Compliance with extended-release oxybutynin.
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Fig. 4
Flow chart of the medication changes.
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Table 1
Side effects of extended-release oxybutynin
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Table 2
Comparison of efficacy and side effects of the extended-release oxybutynin (oxybutynin ER) between the patients who could use immediate-release oxybutynin (oxybutynin IR) and the patients who could not
kju-48-1064-i002

*The patients who could use oxybutynin IR, †The patients who could not use oxybutynin IR because of side effects or lack of efficacy, ‡chi-square. IR: immediate-release, ER: extended-release

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