On January 25, 2024, the U.S. Food and Drug Administration (FDA) approved Dupixent® (dupilumab) to be used in the treatment of eosinophilic esophagitis (EoE) for pediatric patients ages 1 to 11 years and weighing at least 33 lbs. The drug was first approved for this indication in May 2022 for patients 12 years and older and weighing at least 88 lbs. This expanded approval for younger pediatric patients was granted under Priority Review. Approximately 21,000 children in the United States ages 12 years and younger carry an EoE diagnosis. This chronic, progressive disease can result in damage to the esophagus and its functioning. Symptoms of EoE include difficulty swallowing, impaired ability to eat, vomiting, abdominal discomfort and heartburn. The pain and discomfort often lead to refusal to eat and difficulty gaining weight, thereby slowing growth and development. Dupixent® is a monoclonal antibody that targets the two main inflammatory pathways associated with the underlying cause of EoE. Prior to this approval, treatment of younger patients with EoE was limited to the off-label use of medications for symptom management rather than therapies that addressed the root cause. In clinical trials, 66% of participants in the younger age range achieved disease remission after 16 weeks of treatment with Dupixent®, defined as a reduction in the number of eosinophils in the esophageal lining. They also experienced a greater reduction in the proportion of days they experienced symptoms of EoE, compared to those given a placebo. The main side effects of Dupixent® include joint pain, injection site reactions and increased risk of infection. Dupixent® was proven to be effective and well-tolerated in the management of EoE in children under the age of 12 and offers the first FDA-approved treatment option for this population.