# FDA Approves Hospira's Phytonadione (Vitamin K1) for Intramuscular Injection Hospira, Inc. received FDA approval for phytonadione (Vitamin K1) injection, expanding the availability of this critical anticoagulant reversal agent in the U.S. market. The approval strengthens Hospira's position in the injectable pharmaceutical segment and provides clinicians with an essential therapeutic option for managing warfarin overdose and vitamin K deficiency conditions.