Answer
Contact the haemophilia team promptly. Reduced response may have several causes, including development of a factor IX inhibitor.
Sources for this answer
- ALPROLIX 3000 IU powder and solvent for solution for injection — Current selected SmPCemc · Summary of Product Characteristics
- NHSNHS · NHS medicine guidance
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.