Pfizer’s EPO Biosimilar Stalls In US On Hospira Compliance Woes

US FDA hands Pfizer its second complete response letter for its proposed biosimilar to Epogen/Procrit, citing manufacturing compliance concerns at a legacy Hospira manufacturing facility in Kansas that was the target of a February warning letter. Issue “is not directly related to EPO itself,” Pfizer’s Salomon Azoulay says.