title: Clinical studies in the treatment of vascular headache.
mesh_terms: D002986:Clinical Trials as Topic; D005260:Female; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D008297:Male; D008784:Methysergide / Q000009:adverse effects / Q000627:therapeutic use*; D008881:Migraine Disorders / Q000188:drug therapy
chemical_list: D008784:Methysergide