TSLP and asthma: <h4>Background</h4>Tezepelumab, an anti-thymic stromal lymphopoietin (TSLP) monoclonal antibody, reduces exacerbations across asthma phenotypes, but its role in status asthmaticus and near-fatal exacerbations requiring veno-venous extracorporeal membrane oxygenation (VV-ECMO) is unclear.<h4>Methods and results</h4>We report three patients (17, 22, 57 years) with therapy-refractory hypercapnic respiratory failure initiated on VV-ECMO who received tezepelumab 210 mg within 24 h.