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  • Title: Study of cross-reactivity between proton pump inhibitors.
    Author: Sobrevia Elfau MT, Garcés Sotillos M, Ferrer Clavería L, Segura Arazuri N, Monzón Ballarin S, Colás Sanz C.
    Journal: J Investig Allergol Clin Immunol; 2010; 20(2):157-61. PubMed ID: 20461971.
    Abstract:
    Several studies have demonstrated different cross-reactivity patterns between proton pump inhibitors (PPIs). The aim of this study was to investigate cross-reactivity between commercially available PPIs and establish a procedure for performing cutaneous tests for verifying PPI allergy. We performed skin prick and intradermal tests with all commercially available PPIs in 5 patients with clinical allergy to omeprazole and observed positive results in all patients. We report 5 cases of immunoglobulin (Ig) E-mediated allergy to omeprazole and document cross-reactivity by skin testing between all the PPIs studied. We also found that the probability of confirming an IgE-mediated mechanism with skin tests decreases with time. Finally, we propose a hypothesis that could explain the different PPI cross-reactivity patterns reported.
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