“OC-04 | The Chronopharmacology of Atogepant in Migraine Prevention: A Real-World Evaluation of Influence of Timing of Administration on Effectiveness and Tolerability: Luigi Francesco Iannone,1,2 Gabriele Sebastianelli,3 Flavia Lo Castro,2 Federico De Santis,4 Michele Corrado,5 Marilena Marcosano,6,7 Raffaele Ornello,4 Licia Grazzi,8 Danilo Antonio Montisano,8 Francesco De Cesaris,9 Antonio Munafò,9 Gianluca Avino,10 Michele Trimboli,11 Maria Albanese,12 Antonio Russo,13 Giorgio Dalla Volta,14 Marina Romozzi,15 Paola Merlo,16 Luisa Fofi,6,7 Alberto Doretti,17 Gloria Vaghi,5 Francesca Pistoia,4 Delfina Ferrandi,18 Stefania Battistini,19 Gianluca Coppola,3 Simona Sacco,4 Simona Guerzoni,2 Claudia Altamura,6,7 Fabrizio Vernieri,6,7 On Behalf of the Italian Headache Registry (RICe) Study Group | 1Department of Biomedical, Metabolic, and Neural Science, University of Modena and Reggio Emilia; 2Pharmacology and Clinical Metabolic Toxicology-Headache Center and Drug Abuse-Laboratory of Clinical Pharmacology and Pharmacogenomics, AOU Policlinico Di Modena; 3Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome Polo Pontino, Latina; 4Department of Biotechnological and Applied Clinical Sciences, University of L’Aquila; 5Department of Brain and Behavioral Sciences, University of Pavia; Headache Science and Neurorehabilitation Unit, IRCCS Mondino Foundation, Pavia; 6Headache Unit, Fondazione Policlinico Universitario Campus Bio-Medico, Roma; 7Neurology Unit, Università Campus Bio-Medico Di Roma; 8Neuroalgology Unit and Headache Center, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan; 9Headache Center and Clinical Pharmacology, AOU Careggi, Florence; 10SOC Neurologia, Ospedale Di Prato; 11Azienda Ospedaliera-Universitaria "Renato Dulbecco", Catanzaro; 12Università Roma Tor Vergata, Roma; 13Università Della Campania ‘Luigi Vanvitelli’, Napoli; 14U.O Neurologia, Istituto Clinico Città Di Brescia, Gruppo San Donato, Brescia; 15Fondazione Policlinico Universitario A. Gemelli IRCCS, Università Cattolica Del Sacro Cuore, Roma, Italy; 16UO Di Neurologia, Humanitas Gavazzeni, Bergamo; 17Department of Neurology and Laboratory of Neuroscience, IRCCS Istituto Auxologico Italiano, Milano; 18Neurology Department, Azienda Ospedaliero Universitaria, Santi Antonio E Biagio E Cesare Arrigo, Alessandria; 19Department of Medical, Surgical and Neurological Sciences, University of Siena, Italy”. 2025. Confinia Cephalalgica 35 (S1). https://doi.org/10.4081/cc.2025.15801.