This was a rigorous and well-executed double-blind, double-placebo−controlled randomized trial. By utilizing broad inclusion criteria and enrolling patients both with and without previous exposure to anticholinergic medications, the generalizability of study findings are greatly improved. Because this study did not examine the effect or efficacy of repeat injections, these findings have limited applicability to patients undergoing multiple onabotulinumtoxinA injections.
When considering use in your patient population, keep the possible side effects in mind.There were important differences in the side effects experienced with each therapy. Specifically, while the anticholinergic group had a higher frequency of dry mouth (46% anticholinergic vs 31% onabotulinumtoxinA, P = .02), the onabotulinumtoxinA group demonstrated higher rates of incomplete bladder emptying requiring catheterization (peak of 5% at 2 months) and greater risk of UTI (33% onabotulinumtoxinA vs 13% anticholinergic, P <.001).
This study showed that, among women with UUI, anticholinergic medication and onabotulinumtoxinA are equally effective in reducing UUI episodes and improving quality of life. It is important to consider the side effect profile, determine the patient’s preferences, and weigh the risks and benefits of each therapy when deciding what is the best treatment for your individual patient.
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