title: Aspirin sensitivity: acetylsalicylate or excipients.
abstract: We present three patients who developed urticaria while taking an enteric formulation of aspirin, confirmed on a second exposure. Although hypersensitivity reactions to aspirin, especially in asthmatic patients or those with nasal polyps, are well reported, our patients did not exhibit any underlying history of atopy. Furthermore, two of the patients were able to tolerate a soluble formulation. We review the literature and discuss whether these symptoms might be caused by pharmaceutical excipients, present in very small amounts in the enteric coating, rather than the active ingredient acetylsalicylate. Adverse reactions to excipients are fortunately rare but are occasionally reported.
authors.affiliation: Pharmaceutical Services Sandwell and West Birmingham NHS Trust, City Hospital, Birmingham, UK. hebron@swbh.nhs.uk
authors.forename: B S
authors.initials: BS
authors.lastname: Hebron
authors.forename: H J
authors.initials: HJ
authors.lastname: Hebron
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001241:Aspirin / Q000009:adverse effects*; D004342:Drug Hypersensitivity / Q000175:diagnosis* / Q000517:prevention & control; D005079:Excipients / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D013608:Tablets, Enteric-Coated / Q000009:adverse effects; D014581:Urticaria / Q000139:chemically induced / Q000175:diagnosis
chemical_list: D005079:Excipients; D013608:Tablets, Enteric-Coated; D001241:Aspirin