Background: Dupilumab is the first biologic available to treat atopic dermatitis (AD). Its effectiveness and safety were demonstrated in clinical trials. Objective:We sought to assess the effectiveness and safety of dupilumab in adults with AD in a real-life French multicenter retrospective cohort.Methods: Patients were included between March 2017 and April 2018. Efficacy outcomes were collected both at baseline and three months (M3), when available, including SCORAD (Scoring Atopic Dermatitis) and EASI (Eczema Area and Severity Index) scores. Adverse events (AE) were recorded at the follow-up. Results:We included 241 patients. The median follow-up time was 3.8±3.7 months. SCORAD75 and EASI75 were achieved in 27/163 (16.6%) and 40/82 (48.8%) patients, respectively. The median SCORAD and EASI at M3 were significantly lower compared with baseline (25±21 vs 56±27.4, p<10 -9 and 4.1±6.8 vs 17.9±15.4, p<10 -9 , respectively).Conjunctivitis was reported in 84/241 (38.2%) patients. The proportion of eosinophilia (>500/mm 3 ) during follow-up (57%) was higher than at baseline (33.7%) (n=172, p<10 -6 ).Dupilumab was stopped in 42 cases, 27 of which were due to an AE. Limitations:No control group, missing data. Conclusion:This real-life study demonstrated results similar to clinical trials, with regard to dupilumab effectiveness, but revealed a higher frequency of conjunctivitis and eosinophilia.

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