Tag: Warfarin reversal

A single dose of intramuscular vitamin K given to a newborn can provide protection for several months. But for adults, the answer to how long does the effect of vitamin K last varies dramatically depending on the type, dosage, and route of administration, from hours to several weeks.

Research from the Centers for Disease Control and Prevention (CDC) shows that a single vitamin K shot at birth protects newborns from life-threatening bleeds. This fact highlights how vitamin K can prevent hemorrhage, particularly when a deficiency is the cause.

According to the American Heart Association, vitamin K is essential for blood clotting and healthy heart function. For those with a deficiency or taking anticoagulants, understanding how quickly does vitamin K work is critical for medical treatment and safety. The speed of effect varies significantly based on the method of administration and the reason for treatment.