Phytomenadione, also known as vitamin K1 or phylloquinone, is a vitamin found in food and used as a dietary supplement.[1][2] It is on the World Health Organization’s List of Essential Medicines.[3]

As a supplement it is used to treat certain bleeding disorders.[2] This includes warfarin overdose, vitamin K deficiency, and obstructive jaundice.[2] It is also recommended to prevent and treat vitamin K deficiency bleeding in infants.[2] Use is typically recommended by mouth, intramuscular injection or injection under the skin.[2] When given by injection benefits are seen within two hours.[2] Many countries in the world choose intramuscular injections in newborn to keep them safe from severe bleeding (VKDB). It is considered a safe treatment and saves many children from death and severe neurologic deficit every year.[4]