Dupilumab is a monoclonal antibody targeting the interleukin-4 (IL-4) and interleukin-13 (IL-13) receptor complex and is used for the treatment of atopic dermatitis (AD), severe asthma, chronic rhinosinusitis with nasal polyps, and prurigo nodularis (PN). This evidence concerns the gene IL4 and chronic rhinosinusitis.