4.4 Article

Emicizumab prophylaxis for people with hemophilia A: Waste estimation and the Brazilian perspective

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SAUDI PHARMACEUTICAL JOURNAL
卷 31, 期 12, 页码 -

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DOI: 10.1016/j.jsps.2023.101867

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hemophilia A; emicizumab; prophylaxis; waste; budget impact

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The costs of hemophilia A treatment are increasing, and it is important to avoid the waste of clotting products. This study aimed to estimate the first-year waste of emicizumab prophylaxis for hemophilia A patients with inhibitors who failed immune tolerance induction (ITI) in Brazil. The results showed that waste was more pronounced for patients with lower body weight and shorter administration intervals, with the lowest waste observed in the regimen of every 4 weeks.
Costs of hemophilia A treatment are increasing. Waste of clotting products should be avoided. To estimate the first-year waste of emicizumab prophylaxis for people with hemophilia A and inhibitors (PwHAi) who failed immune tolerance induction (ITI), in Brazil. We evaluated the manufacturer and the Brazilian Ministry of Health (MoH) protocol-recommended regimens in a budget impact model. The loading dose consisted of 3.0 mg/kg/ Q1W for 4 weeks, for both recommendations. The manufacturer maintenance regimens comprised 1.5 mg/kg/ Q1W, 3.0 mg/kg/Q2W, and 6.0 mg/kg/Q4W. The MoH protocol maintenance regimen encompassed a hybrid Q1W/Q2W administration, depending on the body weight. The Q4W regimen was not recommended by the MoH protocol. Analyses were performed to estimate waste given its expense based on the World Health Organization body weight range (percentiles [P] 15, 50, and 85). The first-year emicizumab waste was estimated individually and for the disclosed PwHAi who failed ITI (n = 114). The highest emicizumab waste was estimated for the lowest body weights and the Q1W regimen. The Q4W regimen resulted in the lowest emicizumab waste, followed by the MoH protocol regimen. The total reconstituted costs estimated for the PwHAi who failed ITI according to the hybrid MoH protocol ranged from US$32,858,777 (P15) to US$47,186,858 (P85), with emicizumab waste ranging from 7.9 % (US$2,594,515) to 3.7 % (US$1,738,750), respectively. Lost resources due to current protocols for emicizumab prophylaxis for PwHAi who failed ITI in Brazil are considerable. Waste was more pronounced due to lower body weight and shorter administration intervals.

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