Once again, Amgen Inc.’s Tavneos (avacopan) is under U.S. FDA scrutiny, as the agency alerted patients and doctors March 31 about 76 cases of drug-induced liver injury, including eight deaths, with “reasonable evidence of a causal association” with the drug.

Amgen Inc.’s head of R&D James Bradner said his firm was “surprised” by the request from the U.S. FDA Jan. 16 to take Tavneos (avacopan) off the market – and the company said no. “We're in discussions with FDA, and we'll answer questions as we talk with them,” he added.

The EMA has started a review of Amgen Inc.’s Tavneos (avacopan) after questions were raised about the integrity of the data in the Advocate study that the agency assessed when granting approval of the vasculitis treatment in January 2022.

Amgen Inc. is paying $3.7 billion in cash to buy Chemocentryx Inc. The deal, with Amgen paying $52 per share for Chemocentryx stock, brings Amgen Tavneos (avacopan), a first-in-class medicine for treating antineutrophil cytoplasmic antibody-associated vasculitis, which destroys small blood vessels.

European regulators have put off a decision on Biogen Inc and Eisai, Co. Ltd.’s controversial Alzheimer’s drug, aducanumab, for likely another month, after the companies announced further supportive data from a follow-up under review by the FDA.

Less than two weeks after Japan’s MHLW became the first regulatory agency to clear avacopan for anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitis, the FDA has followed suit. It cleared the oral, small-molecule C5aR antagonist for use as an adjunct therapy for adults with the two main forms of the rare autoimmune renal disease, granulomatosis with polyangiitis and microscopic polyangiitis, in combination with standard therapy.