This medication is used to help prevent swelling and painful attacks caused by a certain inherited disease (hereditary angioedema-HAE). Most people with this disease have too little of a certain substance produced by your body (C1-esterase inhibitor). Some people with this disease have... This medication should not be used to treat sudden swelling attacks caused by HAE. Ask your doctor ahead of time what to do if you have a sudden attack. View More Info

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