New Phase 3 Interim Results Support Safety and Efficacy of Diroximel Fumarate in Multiple Sclerosis

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CAMBRIDGE, Mass., May 30, 2019 (GLOBE NEWSWIRE) --  (Nasdaq: BIIB) announced today new interim data from the ongoing open-label, pivotal EVOLVE-MS-1 study indicate that the investigational treatment diroximel fumarate was generally well tolerated in people with relapsing multiple sclerosis (MS). These results were presented at the annual meeting of the Consortium of Multiple Sclerosis Centers (CMSC) in Seattle (May 28–June 1). Diroximel fumarate, a novel oral fumarate candidate in development with Alkermes plc (Nasdaq: ALKS), is under review with the U.S. Food and Drug Administration with a PDUFA (Prescription Drug User Fee Act) target action date in the fourth quarter of 2019. Biogen intends to market diroximel fumarate under the conditionally approved brand name VUMERITY™.

“The results we are presenting at CMSC add to the body of evidence supporting the tolerability of diroximel fumarate and its potential effectiveness in relapsing MS patient populations, including newly diagnosed and early switch patients,” said Michael Ehlers, executive vice president, research & development at Biogen. “We are excited about these data for diroximel fumarate and believe this distinct oral fumarate has the potential to be a meaningful treatment option for people living with MS.”

EVOLVE-MS-1 is an ongoing, single-arm, open-label, two-year, Phase 3 study evaluating the safety and exploring the efficacy of diroximel fumarate in patients with relapsing-remitting MS. The study plans to enroll approximately 1,000 patients. Interim results from 696 patients treated with diroximel fumarate for a median of approximately one year were presented in safety and efficacy analyses at the CMSC meeting.

Researchers explored the efficacy of diroximel fumarate in a sub-group analysis of EVOLVE-MS-1 that included patients naive to prior disease-modifying therapy treatment or those previously treated with an interferon (IFN) or glatiramer acetate (GA). New results in patients treated with prior IFN/GA showed that diroximel fumarate was associated with significant improvements in radiological and clinical endpoints over one year compared to baseline. Adjusted annualized relapse rate was reduced by 72 percent with diroximel fumarate between baseline and Week 48. Additionally, the mean number of gadolinium-enhancing (Gd+) lesions was reduced by 64 percent with diroximel fumarate compared to baseline, and the percentage of patients with no Gd+ lesions at Week 48 was 89 percent compared to 74 percent at baseline.

Additional new data illustrate the tolerability profile of diroximel fumarate in relapsing-remitting MS patients over one year. In the study, diroximel fumarate demonstrated low rates of gastrointestinal (GI) adverse events leading to discontinuation (0.7 percent). The incidence of GI adverse events in patients treated with diroximel fumarate over the one-year treatment period was 30.9 percent. The GI events were generally mild or moderate in severity, typically appeared within the first month of treatment and tended to resolve quickly in the vast majority (89 percent) of patients.

The data presented at CMSC add to the current knowledge base of diroximel fumarate and the interim results Biogen shared at the American Academy of Neurology annual meeting earlier this month (May 4–10) on the potential safety and effectiveness of diroximel fumarate in relapsing MS, particularly in newly diagnosed patients. In addition, the GI tolerability of diroximel fumarate as compared to dimethyl fumarate is being evaluated in the ongoing EVOLVE-MS-2 study, with results expected later this year.

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These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements, including without limitation the occurrence of adverse safety events and/or unexpected concerns that may arise from additional data or analysis; risks of unexpected costs or delays; regulatory authorities may require additional information or further studies, or may fail to approve or may delay approval of our drug candidates, including diroximel fumarate; actual timing and content of submissions to and decisions made by the regulatory authorities regarding our drug candidates, including diroximel fumarate; regulatory submissions may take longer or be more difficult to complete than expected; regulatory authorities may require additional information or further studies, or may fail or refuse to approve or may delay approval of our drug candidates, including diroximel fumarate; the risk that we may not fully enroll our clinical trials or enrollment will take longer than expected; unexpected concerns may arise from additional data, analysis or results obtained during our clinical trials; failure to protect and enforce our data, intellectual property and other proprietary rights and uncertainties relating to intellectual property claims and challenges; uncertainty of success in the development and potential commercialization of VUMERITY; risks relating to the potential launch of VUMERITY, including preparedness of healthcare providers to treat patients, the ability to obtain and maintain adequate reimbursement for VUMERITY and other unexpected difficulties or hurdles; product liability claims; and third party collaboration risks. The foregoing sets forth many, but not all, of the factors that could cause actual results to differ from our expectations in any forward-looking statement. Investors should consider this cautionary statement, as well as the risk factors identified in our most recent annual or quarterly report and in other reports we have filed with the U.S. Securities and Exchange Commission. These statements are based on our current beliefs and expectations and speak only as of the date of this news release. We do not undertake any obligation to publicly update any forward-looking statements, whether as a result of new information, future developments, or otherwise.

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Globe Newswire: 12:30 GMT Thursday 30th May 2019

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