Description and accuracy of antibiotic allergy labels at North Shore Hospital.

Antibiotic allergy labels are common and associated with adverse care. Most people with an antibiotic allergy label are found to be non-allergic on investigation. The aims of this study were to evaluate the burden and accuracy of antibiotic allergy labels at North Shore Hospital and to identify and assess beta-lactam specific allergies, and the potential impact of an inpatient antibiotic allergy service. An evaluation of documented inpatient adverse drug reaction (ADR) labels. Structured assessment of beta-lactam allergies was undertaken using the Austin Health tool. Three hundred and seven patients were reviewed; 78 patients had an antibiotic allergy label, with 102 individual labels. Fifty-five of these 78 patients underwent structured assessment. Forty-four patients had a beta-lactam-specific antibiotic allergy label. Using the Austin Health tool, 9/44 (20%) of beta-lactam-specific allergy labels could have been removed following a history alone and a further 16/44 (36%) would have been appropriate for direct oral challenge. Antibiotic allergy label accuracy was 64% for beta-lactam antibiotics, and 69% for non-beta-lactams. The prevalence of antibiotic specific allergies in our centre was similar to New Zealand and Australian statistics.1,2 Our study showed that a significant proportion of inpatients with a beta-lactam-specific allergy could be de-labelled on history or with a single dose challenge.

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