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  • Title: Diroximel fumarate (DRF) in patients with relapsing-remitting multiple sclerosis: Interim safety and efficacy results from the phase 3 EVOLVE-MS-1 study.
    Author: Naismith RT, Wolinsky JS, Wundes A, LaGanke C, Arnold DL, Obradovic D, Freedman MS, Gudesblatt M, Ziemssen T, Kandinov B, Bidollari I, Lopez-Bresnahan M, Nangia N, Rezendes D, Yang L, Chen H, Liu S, Hanna J, Miller C, Leigh-Pemberton R.
    Journal: Mult Scler; 2020 Nov; 26(13):1729-1739. PubMed ID: 31680631.
    Abstract:
    BACKGROUND: Diroximel fumarate (DRF) is a novel oral fumarate for patients with relapsing-remitting multiple sclerosis (RRMS). DRF and the approved drug dimethyl fumarate yield bioequivalent exposure to the active metabolite monomethyl fumarate; thus, efficacy/safety profiles are expected to be similar. However, DRF's distinct chemical structure may result in a differentiated gastrointestinal (GI) tolerability profile. OBJECTIVE: To report interim safety/efficacy findings from patients in the ongoing EVOLVE-MS-1 study. METHODS: EVOLVE-MS-1 is an ongoing, open-label, 96-week, phase 3 study assessing DRF safety, tolerability, and efficacy in RRMS patients. Primary endpoint is safety and tolerability; efficacy endpoints are exploratory. RESULTS: As of March 2018, 696 patients were enrolled; median exposure was 59.9 (range: 0.1-98.9) weeks. Adverse events (AEs) occurred in 84.6% (589/696) of patients; the majority were mild (31.2%; 217/696) or moderate (46.8%; 326/696) in severity. Overall treatment discontinuation was 14.9%; 6.3% due to AEs and <1% due to GI AEs. At Week 48, mean number of gadolinium-enhancing lesions was significantly reduced from baseline (77%; p < 0.0001) and adjusted annualized relapse rate was low (0.16; 95% confidence interval: 0.13-0.20). CONCLUSION: Interim data from EVOLVE-MS-1 suggest DRF is a well-tolerated treatment with a favorable safety/efficacy profile for patients with RRMS.
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