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Cost-effectiveness of cenobamate for focal seizures in people with drug-resistant epilepsy

Laskier, Vicki; Agyei-Kyeremateng, Kenneth K; Eddy, Alex E; Patel, Dilip; Mulheron, Stuart; James, Samuel; Thomas, Rhys H; (2023) Cost-effectiveness of cenobamate for focal seizures in people with drug-resistant epilepsy. Epilepsia , 64 (4) pp. 843-856. 10.1111/epi.17506. Green open access

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Abstract

OBJECTIVES: To estimate the cost-effectiveness of add-on cenobamate in the UK when used to treat drug-resistant focal seizures in adults who are not adequately controlled with at least two prior antiseizure medication, including at least one used adjunctively. METHODS: We estimated the cost per quality-adjusted life-year (QALY) for cenobamate compared to brivaracetam, eslicarbazepine, lacosamide and perampanel in the UK National Health Service over a lifetime time horizon. We used a Markov cohort structure to determine response to treatment, using pooled data from three long-term studies of cenobamate. A network meta-analysis informed the likelihood of response to therapy with brivaracetam, eslicarbazepine, lacosamide and perampanel relative to cenobamate. Once individuals discontinued treatment, they transitioned to subsequent treatment health states, including other antiseizure medicines, surgery, and vagus nerve stimulation. Costs included treatment, administration, routine monitoring, event management and adverse events. Published evidence and expert opinion informed the likelihood of response to subsequent treatments, associated adverse events, and costs. Utility data was based on short-form, six dimensions utility. Discounting was applied at 3.5% per annum as per National Institute for Health and Care Excellence guidance. Uncertainty was explored through deterministic and probabilistic sensitivity analyses. RESULTS: In the base case, cenobamate led to cost savings of £51,967 (compared to brivaracetam), £21,080 (compared to eslicarbazepine), £33,619 (compared to lacosamide), and £28,296 (compared to perampanel) and increased QALYs of 1.047 (compared to brivaracetam), 0.598 (compared to eslicarbazepine), 0.776 (compared to lacosamide), and 0.703 (compared to perampanel) per individual over a lifetime time horizon. Cenobamate also dominated the four drugs across most sensitivity analyses. Differences were due to reduced seizure frequency with cenobamate relative to comparators. SIGNIFICANCE: Cenobamate improved QALYs and was less costly than brivaracetam, eslicarbazepine, lacosamide and perampanel. Therefore, cenobamate may be considered as a cost-effective adjunctive antiseizure medication for people with drug-resistant focal seizures.

Type: Article
Title: Cost-effectiveness of cenobamate for focal seizures in people with drug-resistant epilepsy
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1111/epi.17506
Publisher version: https://doi.org/10.1111/epi.17506
Language: English
Additional information: © 2023 Fiecon Limited and The Authors. Epilepsia published by Wiley Periodicals LLC on behalf of International League Against Epilepsy. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.
Keywords: Adjunctive, antiseizure medicine, economic evaluation, QALY, quality- adjust life-year
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Clinical and Experimental Epilepsy
URI: https://discovery.ucl.ac.uk/id/eprint/10163415
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