What is Vitamin K1 (phytonadione)?
Phytonadione is a man-made form of vitamin K. Phytonadione is important in the production of substances that cause the blood to clot. Phytonadione is used to treat vitamin K deficiency and to treat certain bleeding or blood clotting problems. Phytonadione may also be used for purposes other than those listed in this medication guide.