A case of dupilumab-induced psoriasis-like eruption treated with baricitinib.

Dupilumab is a humanized monoclonal antibody against the interleukin (IL)-4 receptor alpha chain that inhibits IL-4 and IL-13 signalling. It is one of the systemic treatments for patients with moderate-to-severe atopic dermatitis (AD), which provides favourable safety and efficacy. We report a case of psoriasis-like eruption induced by dupilumab as an adverse effect in a patient with AD, immediately remitted after switching to baricitinib, which inhibits JAK1/2. Moreover, the atopic skin lesion also simultaneously went into remission upon baricitinib treatment. Baricitinib could be a favourable option for patients with AD who develop dupilumab-induced psoriasis-like eruption.