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Diagnosis of Pyrazolone Drug Sensitivity: Clinical History Versus Skin Testing and In Vitro Testing

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Pyrazolone drug hypersensitivity (PDH) may manifest as angioedema, urticaria, and/or life threatening anaphylactic shock. Although it has been suggested that PDH is an immunologic, probably IgE-mediated reaction, the diagnosis of PDH is still based on clinical history because there is no reliable in vitro diagnostic method currently used in clinical practice. The goal of this study was to evaluate the reliability of various methods to confirm a diagnosis of PDH. Twenty-eight patients with prior history of 71 reactions to pyrazolone drugs were studied. In all patients, pyrazolone drugs induced urticaria and angioedema. In addition, laryngeal edema occurred in 14 patients and anaphylactic shock with loss of consciousness in five patients. Skin prick test and intradermal tests using increasing concentrations of noraminophenazone were performed in 25 patients. Sera of all 28 patients were negative for pyrazolone-specific IgE as determined by an immunoenzymatic method. Peripheral blood mononuclear cells proliferative responses to pyrazolone were studied by a lymphocyte proliferation test with 3H-thymidine incorporation. Incubation of peripheral blood mononuclear cells with increasing concentrations of noraminophenazone did not induce any significant proliferation responses. Our study demonstrated that 1) intradermal skin tests correlate poorly with the clinical history of hypersensitivity reaction; and 2) in vitro tests are not useful in establishing a diagnosis of PDH.
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Document Type: Research Article

Publication date: 1999-11-01

More about this publication?
  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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