The proposed research project will retrospectively review the anesthetic records over the past 5 years and identify patients who present with a history of penicillin allergy or allergy to an antibiotic in the penicillin family. The reason for that history and the facts on which that allergy are noted will be determined. Additionally, the choice of antibiotic prophylaxis will be recorded and any adverse effect to that antibiotic noted. We will also note whether appropriate timing of the antibiotic is achieved.
Inclusion Criteria:
Exclusion Criteria: