The Patent Trial and Appeal Board ruled against the generic drugmaker's inter partes review seeking to overturn the patent covering Tecfidera. The drug, which had $4.4 billion in sales last year, could remain protected through February 2028.
An analyst wrote that while the new drug, Vumerity, has a good chance of winning FDA approval later this year, it is uncertain whether the superior gastrointestinal tolerability it demonstrated will be enough to protect Tecfidera from generic competition.
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