BOSTON - Alexion Pharmaceuticals, Inc. (NASDAQ: ALXN) today announced that Japan's Ministry of Health, Labour and Welfare (MHLW) approved ULTOMIRIS (ravulizumab) for adults and children living with atypical hemolytic uremic syndrome (aHUS).

ULTOMIRIS is the first and only long-acting C5 inhibitor for aHUS and is administered every other month for adults and children (20 kg or more) and monthly for children (

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