Human activated protein C is a pharmaceutical preparation of the main protein that assists in stopping clotting of blood. It is used in the treatment of sepsis and septic shock, as well as treating certain types of bleeding disorders. However there is evidence to show that it does not improve mortality in sepsis, and actually increases bleeding.
As seen in Humpty Dumpty, it is extremely dangerous as it can increase the risk of bleeding, evidenced by the patient having an intracranial bleed causing right sided paralysis
See also Vitamin K - the vitamin necessary for the formation of protein C in the body
Protein C deficiency - a rare genetic disease where the body cannot form Protein C.