The US Food and Drug Administration (FDA) has approved Pfizer’s Nivestym; a second biosimilar of Amgen’s Neupogen (filgrastim). In March 2015, the FDA approved its first biosimilar: a version of Neupogen called Zarxio, marketed by Novartis subsidiary Sandoz. Three years later and a second filgrastim biosimilar is close to being available after the FDA approved Pfizer’s product NIvestym. A spokesperson from the Biopharma firm told BioProcess Insider Pfizer will be able to compete against both Amgen’s reference biologic and Sandoz’s…