Therapy Areas

This information is intended for the UK public


Haemophilia is a rare genetic disorder that affects the blood’s ability to clot. People with haemophilia have lower levels of certain clotting factors and therefore if they are injured they may bleed for longer than usual.  The two most common types of Haemophilia are:

  • Haemophilia A – caused by deficiency of coagulation factor VIII (FVIII)
  • Haemophilia B – caused by deficiency of coagulation factor IX (FIX)

Treatment Options for Haemophilia

The treatment of haemophilia differs according to the type and severity of the disease, which may be mild, moderate or severe. The majority of patients will have haemophilia A.