FAP, May 16 / PRNewswire-FirstCall-Asianet /-- the Federal Trade Commission (FTC) is expected to file a lawsuit on Tuesday local time to block Amgen's $27.8 billion acquisition of biopharmaceutical company Horizon Therapy (Horizon Therapeutics), saying it will hurt competition in drug development, according to a person familiar with the matter. Horizon develops drugs to treat rare autoimmune diseases and severe inflammation, which are headquartered in Ireland and currently sold mainly in the United States. (Bloomberg)