title: Hypersensitivity reactions to paracetamol in children: a study of 25 cases.
abstract: BACKGROUND
  Allergic-like reactions to paracetamol (acetaminophen) are rare. Paracetamol allergic and nonallergic hypersensitivity (HS) has been diagnosed in a few patients with skin and/or respiratory symptoms, immediate and accelerated urticaria, and angioedema especially. Most patients with HS to paracetamol were also hypersensitive to anti-inflammatory drugs (i.e. acetylsalicylic acid, ASA), suggesting that their reactions resulted from a nonallergic HS. However, anaphylactic reactions, and potentially harmful toxidermias, such as acute generalized exanthematic pustulosis and toxic epidermal necrolysis, have been related to specific paracetamol allergic HS, with tolerance to anti-inflammatory drugs.
  
  
  METHODS
  We report the results of a study performed in 25 children with suspected paracetamol HS. Diagnosis of paracetamol HS was based on a suggestive clinical history and a positive response in an oral challenge (OC) test.
  
  
  RESULTS
  Paracetamol HS was diagnosed in only one child (4%). In this child, a positive response to an OC with ASA diagnosed HS to anti-inflammatory drugs.
  
  
  CONCLUSIONS
  Our results in children agree with those of the literature, showing that paracetamol HS is rare, and is associated with HS to anti-inflammatory drugs in most patients.
authors.affiliation: Service de Médecine Infantile B, Hôpital d'Enfants de Tunis, Tunis, Tunisie.
authors.forename: K
authors.initials: K
authors.lastname: Boussetta
authors.forename: C
authors.initials: C
authors.lastname: Ponvert
authors.forename: C
authors.initials: C
authors.lastname: Karila
authors.forename: M Le
authors.initials: ML
authors.lastname: Bourgeois
authors.forename: J
authors.initials: J
authors.lastname: Blic
authors.forename: P
authors.initials: P
authors.lastname: Scheinmann
mesh_terms: D000082:Acetaminophen / Q000009:adverse effects*; D000293:Adolescent; D018712:Analgesics, Non-Narcotic / Q000009:adverse effects*; D000893:Anti-Inflammatory Agents / Q000009:adverse effects; D002648:Child; D002675:Child, Preschool; D003429:Cross Reactions; D004342:Drug Hypersensitivity / Q000209:etiology*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male
chemical_list: D018712:Analgesics, Non-Narcotic; D000893:Anti-Inflammatory Agents; D000082:Acetaminophen