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What is alpha-proteinase inhibitor?

Alpha-proteinase inhibitor is used to treat certain cases of the chronic lung disease, emphysema. Some people are born without a key protein in their bodies known as alpha 1-antitrypsin. Without that protein, an enzyme can begin breaking down lung tissue, damaging the lungs and leading to emphysema. Alpha-proteinase inhibitor (also called alpha-1 proteinase inhibitor) blocks that enzyme and prevents further tissue damage. Alpha-proteinase inhibitor is delivered as an IV infusion and prescribed under the brand names Zemaira, Prolastin and Aralast.

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