Efficacy and safety of oxybutynin topical gel 3% in patients with urgency and/or mixed urinary incontinence: a randomized, double-blind, placebo-controlled study.

Abstract

AIMS:

To assess the efficacy and safety of oxybutynin transdermal gel 3% (OTG3%), with propylene glycol for enhanced skin permeation, in patients with urinary incontinence (UI).

METHODS:

In this phase 3 study, 626 patients ≥18 years old with urgency and/or mixed UI symptoms and predominantly urgency UI for ≥3 months were randomized 1:1:1 to receive 12 weeks of OTG3% 84 mg, OTG3% 56 mg, or placebo gel applied once daily to abdomen, inner/upper thigh, or upper arm/shoulder. Primary efficacy endpoint was change from baseline to Week 12 in weekly UI episodes recorded in 3-day bladder diaries. Results were compared using analysis of covariance. Adverse events (AEs) were monitored.

RESULTS:

Efficacy was assessed in 601 (intent-to-treat) and safety in 626 patients. At 12 weeks, OTG3% 84 mg/day achieved significantly greater improvement versus placebo in weekly UI episodes (mean change from baseline: -20.4 vs. -18.1; P < 0.05(a)), daily urinary frequency (-2.6 vs. -1.9; P = 0.001(b)), and urinary void volume (32.7 vs. 9.8; P < 0.0001(b)). Dry mouth, the most common treatment-related AE, occurred more often with OTG3% 84 mg/day (26/214 [12.1%]) vs. placebo (10/202 [5.0%]) (P = 0.028); 4 OTG3% patients withdrew because of dry mouth. Application site erythema occurred more often with OTG3% 84 mg/day (8/214 [3.7%]) versus placebo (2/202 [1.0%]) (P = NS); 12 OTG patients withdrew because of skin irritation. No serious treatment-related AEs occurred.

CONCLUSIONS:

OTG3% 84 mg/day was well tolerated and effective in improving urge incontinence or mixed UI symptoms with a predominance of UI in adults with overactive bladder.

• Authors: Evan R Goldfischer, Peter K Sand, Heather Thomas, Jill Peters-Gee
• Journal: Neurourology and urodynamics (Neurourol Urodyn) Vol. 34 Issue 1 Pg. 37-43 (Jan 2015) ISSN: 1520-6777 [Electronic] United States
• PMID: 24133005 (Publication Type: Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: © 2013 Wiley Periodicals, Inc.

Chemical References

• Gels
• Mandelic Acids
• Urological Agents
• oxybutynin

Topics

• Administration, Cutaneous
• Adult
• Aged
• Aged, 80 and over
• Double-Blind Method
• Female
• Gels
• Humans
• Male
• Mandelic Acids (administration & dosage, adverse effects, therapeutic use)
• Middle Aged
• Quality of Life
• Treatment Outcome
• Urinary Incontinence (drug therapy)
• Urological Agents (administration & dosage, adverse effects, therapeutic use)
• Young Adult