The US Food and Drug Administration has approved a new formulation of the genetically engineered version of Factor VIIa, a plasma protein essential for the clotting of blood.

NovoSeven RT—the new formulation of NovoSeven Coagulation Factor VIIa (Recombinant)—contains sucrose and L-Methionine, which allow for storage at room temperature. This is helpful for health-care facilities with limited refrigerated space. The original formula could be stored for three years at temperatures between 36 and 46 degrees Fahrenheit. The new formulation allows the product to be stored at room temperature (up to 81 degrees Fahrenheit) for up to two years.

NovoSeven RT shares the same uses as the earlier NovoSeven product. These uses include the treatment of bleeding and the prevention of surgical bleeding in patients with hemophilia A or B, who have antibodies that neutralize the action of clotting Factors VIII or IX; the treatment of bleeding and the prevention of surgical bleeding in patients with congenital Factor VII deficiency; and the prevention of surgical bleeding in patients with acquired hemophilia. Coagulation factors are proteins found in plasma, which help blood clot. When one or more of these proteins are missing or inactive, bleeding can occur.