<unk> (injection) is a vitamin that is FDA approved for the treatment of coagulation disorders which are due to faulty formation of factors II, VII, IX and X when caused by vitamin K deficiency or interference with vitamin K activity. It's also been used as a prophylaxis of hemorrhagic disease of the newborn. There is a Black Box Warning for this drug as shown here.  Common adverse reactions include skin reaction.
Phytonadione 
Hydroquinone
Ethadione
Hemocyanin
Toxidrome
Hemin
Menadione
Avidin