A change in the US Food and Drug Administration’s scientific thinking led Amgen, Inc. to request an interchangeability designation for Wezlana, a biosimilar of Janssen Biotech Inc.’s Stelara (ustekinumab), in the last month of the product’s regulatory review.
With plans to seek initial approval of Wezlana (ustekinumab-auub) only as a biosimilar, Amgen’s biologics license applications did not include...








