“OC-08 | Daily eletriptan significantly improves treatment-resistant cluster headache: a case series: Andrea Burgalassi,1 Antonio Munafò,2 Francesco De Cesaris,1 Giulia Vigani,2 Alberto Chiarugi1,2 | 1Headache Center and Clinical Pharmacology Unit, Careggi University Hospital, Florence; 2Section of Clinical Pharmacology and Oncology, Department of Health Sciences, University of Florence, Florence, Italy” (2025) Confinia Cephalalgica [Preprint]. doi:10.4081/cc.2025.15805.