Multicenter phase III trial studying trospium chloride in patients with overactive bladder.
OBJECTIVE
To study the efficacy and safety of trospium chloride in treating overactive bladder. Trospium chloride is an anticholinergic agent with predominantly peripheral nonselective antimuscarinic activity and thus has potential therapeutic value in treating patients with overactive bladder.


METHODS
Patients with overactive bladder were randomized on a 1:1 basis to either placebo or trospium chloride 20 mg twice daily in this 12-week, multicenter, parallel, double-blind, placebo-controlled study. The primary endpoint was the change in the average number of toilet voids per 24 hours. The secondary efficacy variables were changes in the average void urgency severity, volume per toilet void, urge frequency, number of daily urge urinary incontinence episodes, and daytime sleepiness.


RESULTS
A total of 658 patients were randomized at 52 sites. Trospium chloride significantly decreased the average number of daily toilet voids, average urgency severity, urge frequency, and urge urinary incontinence episodes and increased the average volume per void at weeks 1, 4, and 12. All effects occurred by the end of week 1 and all improved and were sustained throughout the 12-week study. Adverse events included dry mouth and constipation.


CONCLUSIONS
Trospium chloride had significant and sustained effectiveness beginning at the end of week 1 and continuing through 12 weeks of treatment. Trospium chloride was also safe and generally well tolerated.
Rudy
Delbert
D
North Texas Clinical Research, Urology Associates of North Texas, Arlington, Texas 76017, USA. drudy@uant.com
Cline
Kevin
K
Harris
Richard
R
Goldberg
Kenneth
K
Dmochowski
Roger
R
D001561:Benzilates; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009662:Nortropanes / Q000627:therapeutic use*; D010276:Parasympatholytics / Q000627:therapeutic use*; D014549:Urinary Incontinence / Q000188:drug therapy*
D001561:Benzilates; D009662:Nortropanes; D010276:Parasympatholytics; C003330:trospium chloride