Budget Impact Analysis of Vibegron for the Treatment of Overactive Bladder in the USA
Abstract
Overactive bladder (OAB) is associated with considerable clinical and economic burden. Treatment of patients with OAB using anticholinergics is limited by tolerability issues and increased anticholinergic burden, which is associated with increased risk of dementia and falls/fractures. This analysis assessed the budget impact of introducing the β3-adrenergic agonist vibegron for the treatment of patients with OAB from US commercial payor and Medicare perspectives. A budget impact model (BIM) with a 5-year time horizon was developed using a top-down, prevalence-based approach and projected market shares for 1-million-member US commercial and Medicare plans. The BIM included vibegron, mirabegron, and anticholinergics, incorporating changes in clinical outcomes (efficacy, drug–drug interactions, anticholinergic burden (ACB), OAB-related comorbidities, and adverse events (AEs)). Costs per member per month (PMPM) and per treated member per month (PTMPM) were determined. One-way sensitivity analyses quantified the impact of changes in key variables. The introduction of vibegron was associated with a modest increase in PMPM cost over 5 years of $0.12 (range for years 1‒5, $0.01‒$0.26) for commercial payors and $0.24 ($0.01‒$0.52) for Medicare (PTMPM cost: $2.70 ($0.17‒$4.85) and $3.15 ($0.19‒$5.82), respectively). Costs were partially offset by savings related to decreased third-line treatment use, yearly decreases in AE and comorbidity incidence, reduced drug–drug interactions, and…
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