title: Allergic contact dermatitis in response to budesonide reactivated by inhalation of the allergen.
abstract: BACKGROUND
  Up to 5% of patients with dermatitis who are consecutively patch tested are allergic to one or more corticosteroids. However, few reports of allergic mucosal and skin symptoms in patients with asthma and rhinitis caused by inhaled corticosteroids exist.
  
  
  OBJECTIVE
  Our purpose was to determine whether inhalation of budesonide would result in reactivation of patch test reactions caused by budesonide.
  
  
  METHODS
  The study, which was randomized, double-blind, and placebo-controlled, was ethically reviewed by the Medical Faculty, University of Lund, Sweden. Fifteen nonasthmatic patients who were initially given a diagnosis of budesonide hypersensitivity on patch testing from less than 1 up to 8 years before the study were provoked with budesonide or placebo by inhalation 6 weeks after they had been patch tested with budesonide, its R and S diastereomers, and potentially cross-reacting substances. Lung function was studied by using spirometry and repeated peak expiratory flow measurements.
  
  
  RESULTS
  In 4 of 7 patients who inhaled budesonide, reactivation of previously positive patch test reactions was noted within 24 hours, in contrast to 0 of 8 patients who inhaled placebo (P =.026). No adverse pulmonary responses could be detected.
  
  
  CONCLUSIONS
  This study shows that allergic skin reactions may occur in patients with contact allergy to budesonide when inhaled forms of the drug are used.
authors.affiliation: Department of Occupational and Environmental Dermatology, Malmö University Hospital, Sweden.
authors.forename: Marléne
authors.initials: M
authors.lastname: Isaksson
authors.forename: Magnus
authors.initials: M
authors.lastname: Bruze
mesh_terms: D000280:Administration, Inhalation; D000328:Adult; D000485:Allergens / Q000008:administration & dosage / Q000009:adverse effects*; D001985:Bronchial Provocation Tests; D019819:Budesonide / Q000008:administration & dosage / Q000009:adverse effects*; D017449:Dermatitis, Allergic Contact / Q000209:etiology*; D004311:Double-Blind Method; D004342:Drug Hypersensitivity; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010328:Patch Tests; D010366:Peak Expiratory Flow Rate; D012129:Respiratory Function Tests; D013147:Spirometry
chemical_list: D000485:Allergens; D019819:Budesonide