Refacto

Dosage Required (IU) = Body Weight (kg) × Desired % Factor VIII Increase × 0.5. Individualize. Infuse at rate comfortable to patient. Minor hemorrhage: obtain 20–40% FVIII increase; give every 12–24hrs for at least 1 day until resolved. Moderate hemorrhage and tooth extraction: obtain 30–60% FVIII increase; give every 12–24hrs for 3–4 days until adequate hemostasis; for tooth extraction: a single infusion plus oral antifibrinolytic therapy within 1hr may be sufficient. Major hemorrhage: obtain 60–100% FVIII increase; give every 8–24hrs until resolved; or, for surgery, until local hemostasis achieved. Prophylaxis: give ≥2 times weekly; children may need shorter dosage intervals or higher doses.