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Supportive Care

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What is emicizumab?

Emicizumab (also called Hemlibra®)  is a medicine that acts like FVIII (factor 8) in the body to help your blood to clot. This medicine is used to prevent bleeding in patients with FVIII deficiency (hemophilia A). It is a colorless to pale yellow liquid that is injected under the skin.

This medicine is available in the following strengths:

  • 30 mg/1 ml (this is a different concentration than the other vials)
  • 60 mg/0.4 ml
  • 105 mg/0.7 ml
  • 150 mg/1 ml
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Possible side effects


Symptoms of an allergic reaction include: rash, hives, itching, chills, fever, headache, muscle ache, shortness of breath, coughing, tightness in the throat, swelling of the face or neck.

Not all patients who take emicizumab will experience these side effects. Common side effects are bolded, but there may be others. Please report all suspected side effects to your doctor or pharmacist.

Find more information on side effects.

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Possible late effects

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Tips for patients and families

Be sure to discuss all questions and instructions with your doctor or pharmacist. 

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