A new drug for haemophilia that targets antithrombin, a protein that inhibits blood clotting, has been approved by the US Food and Drug Administration. Discovered by Alnylam Pharmaceuticals Inc and licensed to Sanofi SA, Qfitlia (fitusiran) will be used to treat patients with both haemophilia A and haemophilia B with or without inhibitors. The standard treatment for patients with haemophilia are clotting factor replacement therapies where patients with haemophilia A receive replacement for factor VIII and those with haemophilia B, replacement for factor IX.
