• How do cephalosporin allergies cross-react with penicillins and other cephalosporins?


    Daniel Jolley.

    6 articles.

    Created October 20, 2022, last updated 11 months ago.

    Collection: 156, Score: 223, Trend score: 0, Read count: 229, Articles count: 6, Created: 2022-10-20 03:56:44 UTC. Updated: 2022-10-20 04:00:23 UTC.


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    Collected Articles

    • Pharmacy (Basel) · Jul 2019


      Cephalosporins: A Focus on Side Chains and β-Lactam Cross-Reactivity.

      Cephalosporins are among the most commonly prescribed antibiotic classes due to their wide clinical utility and general tolerability, with approximately 1-3% of the population reporting a cephalosporin allergy. However, clinicians may avoid the use of cephalosporins in patients with reported penicillin allergies despite the low potential for cross-reactivity. The misdiagnosis of β-lactam allergies and misunderstanding of cross-reactivity among β-lactams, including within the cephalosporin class, often leads to use of broader spectrum antibiotics with poor safety and efficacy profiles and represents a serious obstacle for antimicrobial stewardship. ⋯ Cephalosporin cross-reactivity potential is related to the structural R1 side chain, and clinicians should be cognizant of R1 side chain similarities when prescribing alternate β-lactams in allergic individuals or when new cephalosporins are brought to market. Clinicians should consider the low likelihood of true cephalosporin allergy when clinically indicated. The purpose of this review is to provide an overview of the role of cephalosporins in clinical practice, and to highlight the incidence of, risk factors for, and cross-reactivity of cephalosporins with other antibiotics.

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    • Aust Prescr · Apr 2018


      'Cephalosporin allergy' label is misleading.

      no abstract available

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    • Internal medicine journal · Aug 2019

      Immediate cephalosporin allergy.

      Patients who suffer from acute IgE-mediated allergy to a cephalosporin antibiotic are frequently assumed to be at high risk of allergy to other cephalosporins and penicillins. ⋯ In our cohort, cephalosporin allergy does not appear to be a class effect, with most cases found allergic only to their index cephalosporin. Co-sensitisation to other cephalosporins or penicillins was uncommon, and when it occurred, was usually consistent with side chain cross-reactivity.

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    • J Allergy Clin Immunol Pract · Nov 2019

      Meta Analysis

      Cross-Reactivity to Cephalosporins and Carbapenems in Penicillin-Allergic Patients: Two Systematic Reviews and Meta-Analyses.

      There is no recent systematic review on the risk of cross-reactivity to cephalosporins and carbapenems in penicillin-allergic patients despite many new studies on the subject. All past reviews have several limitations such as not including any patient with a T-cell-mediated penicillin allergy. ⋯ Although it remains possible that these meta-analyses overestimated the risk of cross-reactivity, clinicians should consider the increased risk of cross-reactivity associated with aminocephalosporins, and to a lesser extent with intermediate-similarity-score cephalosporins, compared with the very low risk associated with low-similarity-score cephalosporins and all carbapenems when using beta-lactams in patients with a suspected or proven penicillin allergy.

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    • J Allergy Clin Immunol Pract · May 2021

      Cephalosporin Hypersensitivity: Descriptive Analysis, Cross-Reactivity, and Risk Factors.

      Cephalosporins, which belong to the beta-lactam therapeutic class, are increasingly used throughout the world. Few large studies on this issue have been conducted, and most of them have been performed as part of penicillin hypersensitivity studies. ⋯ Almost a quarter of the tested patients were confirmed as hypersensitive to cephalosporins; sensitivity of skin testing was 51.9%, and thus, half of the positive patients needed a DPT to prove the diagnosis.

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    • J Allergy Clin Immunol Pract · Sep 2018

      Cross-Reactivity and Tolerability of Cephalosporins in Patients with IgE-Mediated Hypersensitivity to Penicillins.

      Studies performed since 1990 on samples of at least 30 subjects with a documented IgE-mediated hypersensitivity to penicillins have found a rate of positive responses to allergy tests with cephalosporins ranging from 0% to 27%. ⋯ Cross-reactivity between penicillins and cephalosporins seems to be mainly related to side chain similarity or identity. Subjects with an IgE-mediated hypersensitivity to penicillins could be treated with cephalosporins such as cefuroxime and ceftriaxone that have side-chain determinants different from those of penicillins and are negative in pretreatment skin testing.

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