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Is penicillin allergy de-labelling about to find its place in UK antimicrobial stewardship strategy?

Neil Powell, Mathew Upton, Bridie Kent, Sarah Tonkin-Crine and Jonathan Sandoe
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DOI: https://doi.org/10.7861/clinmed.2022-0518
Clin Med January 2023
Neil Powell
ARoyal Cornwall Hospital, Truro, UK
Roles: consultant antimicrobial scientist
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  • For correspondence: neil.powell2@nhs.net
Mathew Upton
BUniversity of Plymouth, Plymouth, UK
Roles: professor of medical microbiology
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Bridie Kent
CUniversity of Plymouth, Plymouth, UK
Roles: professor of leadership nursing
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Sarah Tonkin-Crine
DUniversity of Oxford, Oxford, UK
Roles: health psychologist
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Jonathan Sandoe
ELeeds General Infirmary, Leeds, UK
Roles: consultant medical microbiologist
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KEYWORDS:
  • antimicrobial stewardship
  • penicillin allergy
  • de-labelling
  • non-allergist

Penicillin allergy records are common, often incorrect and limit antibiotic treatment options for patients.1 Moreover, there are several patient and health system harms associated with penicillin allergy records, which include increased length of hospitalisation, higher rates of ICU admission and hospital readmission, higher risk of multidrug-resistant or opportunistic infection, increased mortality risk, and higher drug and/or hospital-related costs.2

Penicillin allergy assessment has traditionally been undertaken by allergists/immunologists and involves an accurate clinical history, serum testing for specific IgE to penicillin and penicillin skin testing. If these tests are negative then an oral penicillin challenge test dose is prescribed and the patient observed for an hour.3 The paucity of allergy services globally versus the prevalence of penicillin allergy labels has led to exploration of non-specialist means of ‘de-labelling' (assessing penicillin allergy and removing incorrect labels where appropriate). Relatively recently it has been recognised that undertaking a ‘direct oral challenge', ie a drug provocation test without prior skin testing, can be carried out for low-risk patients and is a safe and effective de-label strategy. Recognition of the associated harms of incorrect penicillin allergy records for patients and healthcare systems has driven researchers to explore the safety of non-allergist delivered penicillin allergy de-labelling interventions.

A new systematic review of the literature included 69 studies from around the world, with the majority from the USA (70%) and Australia / New Zealand (16%) and relatively few from Europe (5.8%) and the UK (2.9%).4 The dominance of USA and Australian studies may be due to the early recognition of penicillin allergy de-labelling as an antibiotic stewardship priority by authorities in these countries and subsequent publication of guidelines for non-allergists to deliver penicillin allergy assessment services.1,5 In 2021 the World Health Organization published their endorsement of antibiotic allergy assessment as an effective antimicrobial stewardship strategy providing a global position statement for other countries to follow.6

While the UK recognised the importance of removing incorrect penicillin allergy records in the context of antibiotic stewardship and medication safety in 2015, and the UK antimicrobial stewardship guidelines alluded to direct de-label when the allergy history is not consistent with allergy, there was an absence of guidance on how it should be done.7,8 Moreover, the current European Academy of Allergy and Clinical Immunology (EAACI)9 and previous British Society of Allergy and Clinical Immunology (BSACI) penicillin allergy guidelines3 did not endorse non-allergist allergy assessment and de-label. However, there have been recent developments in the UK, with Scotland publishing their non-allergist de-label toolkit aimed at hospital physicians in 202110 and BSACI publishing guidelines for non-allergist de-labelling in hospitals.11 Both these publications provide toolkits for non-allergy healthcare workers to undertake penicillin allergy de-labelling in the UK.10,11

Although behind in guidance, the UK's National Institute for Health and Care Research has recognised the importance of this topic and funded several studies exploring how to embed penicillin allergy assessment into the NHS, exploring the resource implications and the potential barriers and enablers to implementing penicillin allergy de-labelling patient pathways, as well as quantifying the patient and healthcare benefits of penicillin allergy de-labelling.12–15

The early adoption of penicillin allergy assessment by non-allergists in the USA, Australia and New Zealand and the provision of toolkits to enable non-allergists to deliver this service has facilitated early adoption in these countries. The publication of the recent BSACI guidelines will empower non-allergists to design penicillin allergy assessment interventions and NIHR funded studies will assess how best to implement such interventions in the context of the NHS. Together, these new activities will enable the UK health-system to engage in this important patient safety and antibiotic stewardship priority and facilitate widespread adoption of penicillin allergy assessment and de-label as a standard of care for NHS patients.

  • © Royal College of Physicians 2023. All rights reserved.

References

  1. ↵
    1. Shenoy ES
    , Macy E, Rowe T, Blumenthal KG. Evaluation and management of penicillin allergy: a review. JAMA 2019;321:188–99.
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    1. Krah NM
    , Jones TW, Lake J, Hersh AL. The impact of antibiotic allergy labels on antibiotic exposure, clinical outcomes, and healthcare costs: A systematic review. Infect Control Hosp Epidemiol 2021;42:530–48.
    OpenUrl
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    1. Mirakian R
    , Leech SC, Krishna MT, et al. Management of allergy to penicillins and other beta-lactams. Clin Exp Allergy 2015;45:300–27.
    OpenUrlCrossRefPubMed
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    1. Powell N
    , Stephens J, Kohl D, et al. The effectiveness of interventions that support penicillin allergy assessment and de-labelling of adult and paediatric patients by non-allergy specialists: a systematic review and meta-analysis. Int J Infect Dis 2022, in press.
  5. ↵
    1. Australasian Society of Clinical Immunology and Allergy
    . ASCIA consensus statement for the assessment of suspected allergy to penicillin antibiotics. ASCIA, 2020. www.allergy.org.au/images/stories/hp/info/ASCIA_HP_Consensus_Penicillin_Allergy_2020.pdf [Accessed 12 May 2022].
  6. ↵
    1. World Health Organization
    . Antimicrobial stewardship interventions: a practical guide. WHO, 2021. https://apps.who.int/iris/bitstream/handle/10665/340709/9789289054980-eng.pdf [Accessed 2 July 2021].
  7. ↵
    1. Public Health England.
    Start smart – then focus: antimicrobial stewardship toolkit for English hospitals. PHE, 2015. https://www.gov.uk/government/publications/antimicrobial-stewardship-start-smart-then-focus [Accessed 1 April 2021].
  8. ↵
    1. National Institute for Health and Care Excellence
    . Drug allergy: diagnosis and management. NICE, 2014. www.nice.org.uk/guidance/cg183 [Accessed 1 May 2021].
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    1. Romano A
    , Atanaskovic-Markovic M, Barbaud A, et al. Towards a more precise diagnosis of hypersensitivity to beta-lactams - an EAACI position paper. Allergy 2020;75:1300–15.
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    1. Sneddon J
    , Cooper L, Ritchie N, et al. An algorithm for safe de-labelling of antibiotic allergy in adult hospital in-patients. Clin Exp Allergy 2021;51:1229–32.
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  11. ↵
    1. Savic L
    , Ardern-Jones M, Avery A, et al. BSACI guideline for the set-up of penicillin allergy de-labelling services by non-allergists working in a hospital setting. Clin Exp Allergy 2022;52:1135–41.
    OpenUrl
  12. ↵
    1. National Institute for Health and Care Research
    . Penicillin allergy status and its effect on antimicrobial prescribing, patient outcomes, and antimicrobial resistance. NIHR, 2017. www.fundingawards.nihr.ac.uk/award/RP-PG-1214-20007 [Accessed 3 Nov 2022].
  13. ↵
    1. National Institute for Health and Care Research
    . A multicentre study to investigate a protocol-driven multidisciplinary service model to tackle ‘spurious penicillin allergy' in secondary care (SPACE study). NIHR, 2021. https://fundingawards.nihr.ac.uk/award/NIHR129069 [Accessed 3 Nov 2022].
  14. ↵
    1. National Institute for Health and Care Research
    . Removing erroneous penicillin allergy labels (REPeAL). NIHR, 2020. https://fundingawards.nihr.ac.uk/award/NIHR300542 [Accessed 3 November 2022].
  15. ↵
    1. National Institute for Health Research
    . Improving safety for surgical patients through better diagnosis of drug allergies. NIHR, 2021. https://fundingawards.nihr.ac.uk/award/NIHR301454 [Accessed 3 November 2022].
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Is penicillin allergy de-labelling about to find its place in UK antimicrobial stewardship strategy?
Neil Powell, Mathew Upton, Bridie Kent, Sarah Tonkin-Crine, Jonathan Sandoe
Clinical Medicine Jan 2023, 23 (1) 76-77; DOI: 10.7861/clinmed.2022-0518

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Is penicillin allergy de-labelling about to find its place in UK antimicrobial stewardship strategy?
Neil Powell, Mathew Upton, Bridie Kent, Sarah Tonkin-Crine, Jonathan Sandoe
Clinical Medicine Jan 2023, 23 (1) 76-77; DOI: 10.7861/clinmed.2022-0518
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