Abstract
BackgroundPersistent seizures are associated with physical injury, reduced quality of life, and psychosocial impairment. Perampanel is approved for the adjunctive treatment of primary generalized tonic–clonic seizures (PGTCS). ObjectiveThis study aimed to determine the cost-effectiveness of perampanel as adjunctive therapy to other antiepileptic drugs (AED) compared with AED maintenance therapy alone for the treatment of PGTCS. MethodsWe developed a Markov model for PGTCS where transitions were based on treatment response rates. The analysis was conducted over a 33-year time horizon from the Spanish National Health Service (NHS) and societal perspectives. Efficacy data were derived from clinical studies. Resource use, market shares, costs, and utilities were obtained from Kantar Health's National Health and Wellness Survey. Drug costs were obtained from the Consejo General de Colegios Oficiales de Farmacéuticos. One-way and probabilistic sensitivity analyses were performed. ResultsIn the base case analysis from the NHS perspective, perampanel was associated with an incremental cost-effectiveness ratio (ICER) of €16,557/quality-adjusted life year (QALY) relative to AED maintenance therapy for the treatment of PGTCS. Incremental costs were €5475 and incremental QALYs were 0.33. In one-way sensitivity analyses, the ICERs were strongly influenced by discounting rate for costs and health effects, with little influence of other parameters, including perampanel cost and utilities. In probabilistic sensitivity analyses, the probability of perampanel being cost-effective at a willingness-to-pay threshold of €30,000/QALY was 89.3%. From the societal perspective, perampanel provided a cost-savings of €5288 per patient compared with AED maintenance therapy alone. ConclusionOur study demonstrates that perampanel is likely to be a cost-effective option.
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