So i to have seasonal clusters,have all my life,2 yrs ago,after research..the ch starts at your central nervous system...theres research on ch and marijuana....look up what marijuana does right off the top upon smoked..thc receptors attach them selves to your central nervous system receptors..bam no more ch..so in no dr. But im proof that any drug that effects the central nervous system receptors will stop a cluster headache right from the start...id testify to it anyday...