Cluster headache not responsive to sumatriptan: A retrospective study.
Luca GianiAlberto Proietti CecchiniAlberto AstengoGiuseppe Lauria PinterMassimo LeonePublished in: Cephalalgia : an international journal of headache (2020)
In cluster headache attacks with long duration and high frequency, pain mechanisms not involving 5HT1B/1D receptors may play a more relevant role.