Valrox (valoctocogene roxaparvovec) from San Rafael Calif-based Biomarin Pharmaceutical Inc. moved one step closer to entering the U.S. market, with the company reporting that that the FDA had accepted for priority review the BLA for its investigational AAV5 gene therapy for adults with hemophilia A.

With deeming day a little more than a month away, the FDA is taking final steps to ease the transition of simple proteins approved as new drug applications (NDAs) to biologic license applications (BLAs). The March 23 change will open drugs such as insulin and various hormones to new competition, likely bringing in the next wave of biosimilars. And this time, interchangeability could be riding the crest.

For the first time since Congress opened the door to biosimilars in 2010, the FDA approved nearly as many biosimilars in 2019 as it did new biologics. As the first decade of biosimilars came to a close, the agency’s Center for Drug Evaluation and Research (CDER) approved 10 biosimilars referencing seven blockbuster biologics, bringing the total number of approved biosimilars to 26.