title: Incidence of hypersensitivity reactions.
abstract: BACKGROUND
  Aprotinin is a naturally occurring serine protease inhibitor derived from bovine lung. In common with all foreign proteins, it possesses antigenic properties and has the possibility of allergic reactions on reexposure.
  
  
  METHODS
  Data are presented on the incidence of adverse reactions to aprotinin and the time course of antibody development after initial exposure. Recommendations for reducing the risk and sequelae of these adverse reactions are emphasized and case reports are reviewed.
  
  
  RESULTS
  The incidence rates of aprotinin-related reactions to date (May 1997) at the German Heart Center are 2.7% in the adult population in reexposures (5/183) and 1.2% in the pediatric population (3/254), with an overall incidence of 1.8% (8/437).
  
  
  CONCLUSIONS
  With the recommended precautions, reexposure to aprotinin in patients with a high risk of bleeding is justified, and the benefits of aprotinin treatment outweigh the relative risk of a serious allergic reaction.
authors.affiliation: German Heart Center, Munich.
authors.forename: W
authors.initials: W
authors.lastname: Dietrich
mesh_terms: D000293:Adolescent; D000368:Aged; D007611:Aprotinin / Q000009:adverse effects*; D002648:Child; D004342:Drug Hypersensitivity / Q000209:etiology*; D005260:Female; D006490:Hemostatics / Q000009:adverse effects*; D006801:Humans; D015994:Incidence; D008297:Male; D015842:Serine Proteinase Inhibitors / Q000009:adverse effects*
chemical_list: D006490:Hemostatics; D015842:Serine Proteinase Inhibitors; D007611:Aprotinin