“…Although medications are the first cause of this condition, (with antibiotics as the main aetiology [1]), other possible causes must not be ignored [2,3], including excipients of lidocaine J Investig Allergol Clin Immunol 2023; Vol. 33 (4) © 2022 Esmon Publicidad doi: 10.18176/jiaci.0876 such as sodium carboxymethylcellulose, methylparaben and propylparaben, especially in cases of no previous allergic reactions to food or medication. Here we are describing the first reported case of KS after lidocaine reception, and the alternatives drugs we proposed An episode has been reported previously in the literature after IDT with lidocaine and articaine [4].…”