In lieu of pending guidance, the U.S. FDA’s approval May 20 of Biocon Biologics Ltd.’s Yesafili and Samsung Bioepis Co. Ltd.’s Opuviz as interchangeable biosimilars to Regeneron Pharmaceuticals Inc.’s Eylea (aflibercept) provides further insight into how the agency is approaching the market exclusivity the Biologics Price Competition and Innovation Act awards to the first approved interchangeable for any given biologic.