One treatment with onabotulinumtoxinA relieves symptoms of overactive bladder in patients refractory to one or more oral medications

Introduction and Hypothesis Patients with overactive bladder (OAB) often undergo prolonged treatment with one or more oral OAB medications. OnabotulinumtoxinA (onabotA), a type A botulinum toxin, may provide an appropriate alternative to oral treatments in patients intolerant of or refractory to one or more oral OAB medications. The GRACE study demonstrated real‐world benefits of onabotA treatment for OAB in patients refractory to oral medications. This exploratory post hoc analysis of data from the GRACE study aims to determine if treatment history impacts benefit from treatment with onabotA. Methods This is a subanalysis of the GRACE study, a prospective observational study (NCT02161159) that enrolled patients with symptomatic OAB inadequately managed by at least one oral OAB medication. Patients had a treatment history of one or more anticholinergics (AC) and/or β‐3 adrenoreceptor agonists (β‐3) for relief of OAB; results were stratified according to treatment history. Patients in this analysis elected to discontinue oral medications upon treatment with onabotA. Safety was followed for 12 months in all patients that received at least 1 dose of onabotA; efficacy was determined over a 12‐week period. Results Compared to baseline levels, significant reductions in urinary incontinence (UI), urgency, micturition, and nocturia were noted as early as 1 week and were sustained at 12 weeks, regardless of the type and number of oral medications taken before treatment with onabotA. At 12 weeks post‐onabotA, the mean change from baseline UI episodes/day for those with a treatment history of only one AC was −2.4 (n = 43, p ≤ 0.001); more than one AC, −2.4 (n = 52, p ≤ 0.001); one β‐3, −3.3 (n = 12, p