title: Dyes and preservatives in oral antihistamines.
abstract: Antihistamines are commonly used in the treatment of urticaria. Some antihistamines contain dyes and preservatives which have themselves been shown to produce or exacerbate urticaria; the presence of these substances is not indicated in the usual formularies and a list of commonly prescribed antihistamines is presented, detailing the azo dyes, other dyes and preservatives contained therein.
mesh_terms: D000284:Administration, Oral; D002626:Chemistry, Pharmaceutical; D004396:Coloring Agents; D004339:Drug Compounding; D006634:Histamine H1 Antagonists / Q000008:administration & dosage / Q000627:therapeutic use; D006801:Humans; D010592:Pharmaceutic Aids; D011310:Preservatives, Pharmaceutical; D014581:Urticaria / Q000188:drug therapy
chemical_list: D004396:Coloring Agents; D006634:Histamine H1 Antagonists; D010592:Pharmaceutic Aids; D011310:Preservatives, Pharmaceutical