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Copaescu AM, Li L, Blumenthal KG, Trubiano JA. How to Define and Manage Low-Risk Drug Allergy Labels. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY. IN PRACTICE 2024; 12:1095-1106. [PMID: 38724164 DOI: 10.1016/j.jaip.2024.03.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/07/2024] [Accepted: 03/08/2024] [Indexed: 06/06/2024]
Abstract
Risk stratification in drug allergy implies that specific risk categories (eg, low, moderate, and high) classify historical drug hypersensitivity reactions. These risk categories can be based on reaction phenotypic characteristics, the timing of the reaction and evaluation, the required reaction management, and individual characteristics. Although a multitude of frameworks have been described in the literature, particularly for penicillin allergy labels, there has yet to be a global consensus, and approaches continue to vary between allergy centers. Immune-mediated drug allergies can sometimes be confirmed using skin testing, but a negative drug challenge is required to demonstrate tolerance and remove the allergy from the electronic health record ("delabel" the allergy). Even for quintessential IgE-mediated drug allergy, penicillin allergy, recent data reveal that a direct oral challenge, without prior skin testing, is an appropriate diagnostic strategy in those who are considered low-risk. Drug allergy pathogenesis and clinical manifestations may vary depending on the culprit drug, and as such, the optimal approach should be based on risk stratification that considers individual patient and reaction characteristics, the likely hypersensitivity reaction phenotype, the drug class, and the patient's clinical needs. This article will describe low-risk drug allergy labels, focusing on β-lactam and sulfonamide antibiotics, nonsteroidal anti-inflammatory drugs, iodinated contrast media, and common chemotherapeutics. This review will also address practical management approaches using currently available risk stratification and clinical decision tools.
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Affiliation(s)
- Ana Maria Copaescu
- Centre for Antibiotic Allergy and Research, Department of Infectious Diseases, Austin Health, Heidelberg, VIC, Australia; Department of Medicine, Austin Health, the University of Melbourne, Heidelberg, VIC, Australia; Division of Allergy and Clinical Immunology, Department of Medicine, McGill University Health Centre (MUHC), McGill University, Montreal, QC, Canada; The Research Institute of the McGill University Health Centre, McGill University Health Centre (MUHC), McGill University, Montreal, QC, Canada.
| | - Lily Li
- Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, Wash
| | - Kimberly G Blumenthal
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, Mass; Harvard Medical School, Boston, Mass
| | - Jason A Trubiano
- Centre for Antibiotic Allergy and Research, Department of Infectious Diseases, Austin Health, Heidelberg, VIC, Australia; Department of Infectious Diseases, University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia; The National Centre for Infections in Cancer, Peter MacCallum Cancer Centre, Parkville, VIC, Australia
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Wrenn RH, Trubiano JA. Penicillin Allergy Impact and Management. Infect Dis Clin North Am 2023; 37:793-822. [PMID: 37537003 DOI: 10.1016/j.idc.2023.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023]
Abstract
There is international evidence that penicillin allergies are associated with inferior prescribing and patient outcomes. A host of tools now exist from assessment (risk assessment tools, clinical decision rules) to delabeling (the removal of a beta-lactam allergy via testing or medical reconciliation) to reduce the impact of these "labels" in the hospital and community setting, as a primary antimicrobial stewardship intervention.
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Affiliation(s)
- Rebekah H Wrenn
- Duke University Medical Center, Durham, NC, USA; Duke Center for Antimicrobial Stewardship and Infection Prevention, Durham, NC, USA.
| | - Jason A Trubiano
- Department of Infectious Diseases, Centre for Antibiotic Allergy and Research, Austin Health, Melbourne, Australia; Department of Infectious Diseases, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Victoria 3000, Australia; The National Centre for Infections in Cancer, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
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Mabilat C, Gros MF, Van Belkum A, Trubiano JA, Blumenthal KG, Romano A, Timbrook TT. Improving antimicrobial stewardship with penicillin allergy testing: a review of current practices and unmet needs. JAC Antimicrob Resist 2022; 4:dlac116. [PMID: 36415507 PMCID: PMC9675589 DOI: 10.1093/jacamr/dlac116] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Penicillin allergy, the most frequently reported drug allergy, has been associated with suboptimal antibiotic therapy, increased antimicrobial resistance, increased rates of Clostridioides difficile colonization and infection, as well as extended hospital length of stay and increased cost. Although up to 10% of all patients may report penicillin allergy, most penicillin allergies are not confirmed. As such, most patients with a penicillin allergy can still safely use penicillin and related drugs following a more precise assessment. Herein, we review the current practices and unmet needs in penicillin allergy testing. The diagnostic algorithm is mostly based on a clinical history assessment followed by in vivo testing, i.e. skin test and/or drug challenge. As these tests are labour and resource intensive, there is increased interest in point-of-care penicillin allergy de-labelling solutions incorporated into Antimicrobial Stewardship Programmes including digital assessment tools. These can be locally parameterized on the basis of characteristics of target populations, incidence of specific allergies and local antibiotic usage to perform clinical risk stratification. Safely ruling out any residual risk remains essential and in vivo drug challenge and/or skin testing should be systematically encouraged. Gradual understanding and convergence of the risk stratification of the clinical presentation of penicillin allergy is enabling a wider implementation of this essential aspect of antimicrobial stewardship through digitalized decision tools and in vivo testing. More research is needed to deliver point of care in vitro diagnostic tools to democratize this de-labelling practice, which would be highly beneficial to patient care. This progress, together with better education of patients and clinicians about the availability, efficacy and safety of penicillin allergy testing, will increase the dissemination of penicillin allergy assessment as an important component of Antimicrobial Stewardship Programmes.
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Affiliation(s)
| | - Marie-Françoise Gros
- bioMérieux, Medical Affairs, 100 Rue Louis Pasteur, F-69280 Marcy l'Etoile, France
| | - Alex Van Belkum
- Current address:BaseClear, Sylviusweg 74, 2333 BE Leiden, The Netherlands
| | - Jason A Trubiano
- Department of Infectious Diseases, Centre for Antibiotic Allergy and Research, Austin Health, 145 Studley Road, Heidelberg, Victoria, 3084Australia
| | - Kimberly G Blumenthal
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Massachusetts General Hospital, Boston, MA, USA,Harvard Medical School, Boston, MA, USA
| | | | - Tristan T Timbrook
- bioMérieux, BioFire Diagnostics, Global Medical Affairs, 515 Colorow Drive, Salt Lake City, UT 84108, USA
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