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  • Title: The budget impact of brodalumab for the treatment of moderate-to-severe plaque psoriasis on US commercial health plans.
    Author: Feldman SR, Wu JJ, Rastogi S, Menges B, Lingohr-Smith M, Lin J.
    Journal: J Med Econ; 2018 May; 21(5):537-541. PubMed ID: 29357713.
    Abstract:
    INTRODUCTION: Brodalumab is a new biologic approved by the US Food and Drug Administration in 2017 for the treatment of moderate-severe psoriasis. This study evaluated the impact of the introduction of brodalumab on the pharmacy budget on US commercial health plans. METHODS: An Excel-based health economic decision analytic model with a US health plan perspective was developed. The model incorporated published moderate-to-severe psoriasis prevalence data; market shares of common biologic drugs, including adalimumab, ustekinumab, secukinumab, ixekizumab, and etanercept, used for the treatment of moderate-severe psoriasis; 2017-year Wholesale Acquisition Costs for the biologic drugs; drug dispensing fee; patient co-pay; and drug contracting discount. Total annual health plan costs for the biologic drugs were estimated. Scenarios with different proportions of patients treated with brodalumab were compared to a control scenario when no brodalumab was used. RESULTS: In a hypothetical commercial health plan covering two million members, 7,038 moderate-to-severe psoriasis patients were estimated to be eligible for treatment with brodalumab. Prior to brodalumab approval, the proportions of patients treated by other biologics were estimated at 50.8% for adalimumab, 13.5% for ustekinumab, 14.1% for secukinumab, 4.4% for ixekizumab, and 17.2% for etanercept. With a 20% drug price discount applied to all biologics, the annual health plan costs for brodalumab, adalimumab, ustekinumab, secukinumab, ixekizumab, and etanercept were estimated at $37,224, $49,166, $55,084, $56,061, $64,396, and $57,170, respectively. When no brodalumab is used, the total annual pharmacy budget for the biologics used among these patients was estimated at $414,362,647. Among scenarios where the proportions of brodalumab usage were 3%, 8%, 16%, and 30%, the total annual pharmacy cost was estimated to be reduced by $3,698,129, $9,861,677, $19,723,355, and $36,981,290, respectively. CONCLUSION: Based on the economic model, brodalumab has the potential to substantially reduce pharmacy expenditures for the treatment of patients with moderate-to-severe plaque psoriasis in the US.
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