RT Journal Article T1 Progress in understanding hypersensitivity reactions to nonsteroidal anti-inflammatory drugs. A1 Doña, Inmaculada A1 Pérez-Sánchez, Natalia A1 Eguiluz-Gracia, Ibon A1 Muñoz-Cano, Rosa A1 Bartra, Joan A1 Torres, María José A1 Cornejo-García, José Antonio K1 NERD K1 anaphylaxis K1 clinical immunology K1 drug allergy K1 urticaria AB Nonsteroidal anti-inflammatory drugs (NSAIDs), the medications most commonly used for treating pain and inflammation, are the main triggers of drug hypersensitivity reactions. The latest classification of NSAIDs hypersensitivity by the European Academy of Allergy and Clinical Immunology (EAACI) differentiates between cross-hypersensitivity reactions (CRs), associated with COX-1 inhibition, and selective reactions, associated with immunological mechanisms. Three phenotypes fill into the first group: NSAIDs-exacerbated respiratory disease, NSAIDs-exacerbated cutaneous disease and NSAIDs-induced urticaria/angioedema. Two phenotypes fill into the second one: single-NSAID-induced urticaria/angioedema/anaphylaxis and single-NSAID-induced delayed reactions. Diagnosis of NSAIDs hypersensitivity is hampered by different factors, including the lack of validated in vitro biomarkers and the uselessness of skin tests. The advances achieved over recent years recommend a re-evaluation of the EAACI classification, as it does not consider other phenotypes such as blended reactions (coexistence of cutaneous and respiratory symptoms) or food-dependent NSAID-induced anaphylaxis. In addition, it does not regard the natural evolution of phenotypes and their potential interconversion, the development of tolerance over time or the role of atopy. Here, we address these topics. A state of the art on the underlying mechanisms and on the approaches for biomarkers discovery is also provided, including genetic studies and available information on transcriptomics and metabolomics. YR 2019 FD 2019-10-28 LK http://hdl.handle.net/10668/14459 UL http://hdl.handle.net/10668/14459 LA en DS RISalud RD Apr 8, 2025