J Allergy Clin Immunol Pract
January 2025
Background: Maximal skin testing (ST) nonirritant concentrations (NICs) are consistent for penicillin and aminopenicillin among guidelines. However, there is variability among guidelines for maximal ST NICs of cephalosporins.
Objective: To determine maximal immediate and delayed ST NICs of 15 β-lactams in β-lactam-tolerant and β-lactam-naïve participants.