Dupixent works by targeting a type of protein called an interleukin, that is involved in inflammation. Dupixent calms an overreactive immune system but does not suppress the immune system. This leads to fewer and less severe episodes of inflammation when used to treat conditions such as atopic dermatitis or asthma.

In adults and adolescents, Dupixent (generic name: dupilumab) can start to work as quickly as 2 to 4 weeks to relieve itching due to eczema lead to a clear or almost clear skin improvement in 16 weeks.