“…We read with interest the clinical focus review “Perioperative Anaphylaxis” by Tacquard et al . 1 The authors address management of perioperative anaphylaxis and the use of epinephrine, stating specifically, “Unlike out-of-hospital anaphylaxis where intramuscular epinephrine is the cornerstone of management, intravenous epinephrine, and potentially other vasoactive agents are important for initial management, as noted in advanced cardiac life support algorithms titrated to specific effects.” They reference international consensus recommendations published in 2019 by a group of experts in perioperative allergy, which recommends the IV route for administration of epinephrine. 2 However, in 2020, the American Academy of Allergy, Asthma and Immunology (Milwaukee, Wisconsin) published a systematic review and practice parameter update for anaphylaxis recommending intramuscular injection of epinephrine to the anterolateral thigh as first-line therapy for anaphylaxis.…”