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Topical effect of intravesical oxybutynin
W W Bonney1, R A Robinson, R J Theobald
1Department of Urology, University of Iowa, Iowa City.
The Journal of Urology
|November 1, 1993
Summary
Intravesical oxybutynin instillation in rats did not cause bladder damage, even with infection. High doses offered protection against catheterization and infection side effects.
Area of Science:
- Pharmacology
- Urology
- Toxicology
Background:
- Intravesical drug administration is used for bladder conditions.
- Potential local bladder toxicity from intravesical oxybutynin is not well understood.
- Urinary tract infections and catheterization can cause bladder damage.
Purpose of the Study:
- To investigate the local bladder effects of intravesical oxybutynin in rats.
- To assess the impact of drug concentration and infection on bladder tissue.
- To evaluate potential protective effects against catheterization and infection.
Main Methods:
- Rats received graded doses of intravesical oxybutynin via repeated catheterization for 13 days.
- Bladders were collected for measurement and histological examination.
- Systemic effects like weight changes were monitored.
Main Results:
- No clear drug-related mucosal or bladder wall changes were observed in any dose group.
- Systemic absorption in the highest dose group led to weight loss and cachexia.
- High-dose groups showed protection against adverse effects of catheterization and infection.
Conclusions:
- Intravesical oxybutynin did not demonstrate local bladder toxicity in this rat model.
- High doses of intravesical oxybutynin may offer a protective effect against bladder injury from catheterization and infection.
- Further research is needed to confirm these protective findings and understand the mechanism.