The purpose of this study is to investigate the effects of an oral psilocybin pulse regimen in cluster headache. Subjects will be randomized to receive oral placebo, low dose psilocybin, or high dose psilocybin in three experimental sessions, each separated by 5 days. Subjects will maintain a headache diary prior to, during, and after the pulse regimen in order to document headache frequency and intensity before, during, and after the pulse regimen.
There are limited literature data on migraine-like accompanying features (MLF) in patients with cluster headache (CH). These symptoms are frequently reported by patients and may delay CH diagnosis. The aim of the present study was to investigate the occurrence of migraine-like symptoms in an Italian case series of CH patients and to determine whether these features influence the clinical phenotype of CH.