title: The effect of long-term danazol prophylaxis on liver function in hereditary angioedema-a longitudinal study.
abstract: BACKGROUND
  Danazol is a drug most widely used for the prophylaxis of hereditary angioedema resulting from the deficiency of the C1-inhibitor. Potential hepatotoxic or liver tumor-inducing side effects of long-term danazol prophylaxis have been investigated during the follow-up of hereditary angioedema patients.
  
  
  METHODS
  Characteristic parameters of liver function (including bilirubin, GOT, GPT, gammaGT, total protein, ALP, LDH), as well as findings of viral serology screens and abdominal ultrasonography-determined during years 0 and 5 of follow-up of patient groups taking/not taking danazol-have been reviewed and analyzed comparatively.
  
  
  RESULTS
  From a population of 126 hereditary angioedema patients, 46 subjects taking danazol and another 46 not taking danazol fulfilled the inclusion criteria. Longitudinal follow-up did not reveal any clinically relevant difference between the liver function parameters determined in years 0 and 5 in the two groups. Abdominal ultrasound did not detect neoplastic or other potentially treatment-related alterations of the liver parenchyma. There were no discontinuations of treatment during the study.
  
  
  CONCLUSIONS
  Our results clearly suggest that, administered at the lowest effective dose, danazol does not induce liver injury in hereditary angioedema patients.
authors.affiliation: Department of Internal Medicine, Semmelweis University, Budapest, Hungary. farkash@kut.sote.hu
authors.forename: Henriette
authors.initials: H
authors.lastname: Farkas
authors.forename: Ibolya
authors.initials: I
authors.lastname: Czaller
authors.forename: Dorottya
authors.initials: D
authors.lastname: Csuka
authors.forename: Anikó
authors.initials: A
authors.lastname: Vas
authors.forename: Szilvia
authors.initials: S
authors.lastname: Valentin
authors.forename: Lilian
authors.initials: L
authors.lastname: Varga
authors.forename: Gábor
authors.initials: G
authors.lastname: Széplaki
authors.forename: László
authors.initials: L
authors.lastname: Jakab
authors.forename: George
authors.initials: G
authors.lastname: Füst
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Prohászka
authors.forename: George
authors.initials: G
authors.lastname: Harmat
authors.forename: Beata
authors.initials: B
authors.lastname: Visy
authors.forename: István
authors.initials: I
authors.lastname: Karádi
mesh_terms: D054179:Angioedemas, Hereditary / Q000188:drug therapy* / Q000235:genetics; D056735:Autoimmune Lymphoproliferative Syndrome / Q000188:drug therapy* / Q000235:genetics; D003174:Complement C1 Inactivator Proteins / Q000235:genetics; D050718:Complement C1 Inhibitor Protein / Q000235:genetics; D003613:Danazol / Q000009:adverse effects / Q000627:therapeutic use*; D006801:Humans; D008107:Liver Diseases / Q000503:physiopathology / Q000517:prevention & control*; D008111:Liver Function Tests; D008137:Longitudinal Studies
chemical_list: D003174:Complement C1 Inactivator Proteins; D050718:Complement C1 Inhibitor Protein; C469952:SERPING1 protein, human; D003613:Danazol