Researchers evaluated the reliability of patch testing on dupilumab and the contribution of allergic contact dermatitis to complex dermatitis in patients with residual dermatitis on dupilumab. Atopic dermatitis with comorbid allergic contact dermatitis was highly prevalent and allergen avoidance resulted in significant improvement.

Reference: Raffi J, Suresh R, Botto N, Murase JE. The impact of dupilumab on patch testing and the prevalence of comorbid allergic contact dermatitis in recalcitrant atopic dermatitis: A retrospective chart review. J Am Acad Dermatol. 2020 Jan;82(1):132-138. doi: 10.1016/j.jaad.2019.09.028. Epub 2019 Sep 25. PMID: 31562940.