Despite the Safety of Preoperative Cefazolin for Patients With Non-anaphylactic Penicillin Allergy, 20 % of Practitioners Avoid Its Use

Cefazolin is commonly used for surgical site infection prophylaxis due to its low cost and effective coverage. However, it is controversial to use cefazolin inpatients with a penicillin allergy despite the cross-reactivity between cefazolin and penicillin being only 1%. Ample literature shows that it is safe to use cefazolin in patients with non-anaphylactic penicillin allergies. However, there is often hesitation by anesthesiologists or orthopedists when prescribing this medication in this population. The current authors sent a 16-question survey to all the residency programs in the United States in anesthesiology and orthopedics asking physicians affiliated with these programs to answer a series of questions about their demographics, prescribing patterns, and knowledge of the cross-reactivity between penicillin and cefazolin. A total of 146 responses in each group, with 82.9% (n=121) of orthopedists and 78.8% (n=115) of anesthesiologists preferring cefazolin for patients with non-anaphylactic penicillin allergies. However, only 57.5% of anesthesiologists and 41.1% of orthopedists knew the correct cross-reactivity between cephalosporins and penicillin. If a provider knew the correct cross-reactivity between cefazolin and penicillin,he or she had an increased odds of prescribing cefazolin to patients with non-anaphylactic penicillin allergies (orthopedics odds ratio [OR], 4.77, P<.01; anesthesiologists OR, 3.59, P<.01). Therefore, this study supports that further education of orthopedic and anesthesia providers about the cross-reactivity between cefazolin and penicillin would lead to more evidence-based, cost-effective care.