title: Headache: the spectrum.
mesh_terms: D002543:Cerebral Hemorrhage / Q000150:complications; D003027:Cluster Headache / Q000175:diagnosis / Q000188:drug therapy; D004878:Ergotamine / Q000627:therapeutic use; D013700:Giant Cell Arteritis / Q000150:complications; D006261:Headache / Q000209:etiology*; D006801:Humans; D006974:Hypertension, Malignant / Q000150:complications; D007427:Intracranial Pressure; D008585:Meningitis, Meningococcal / Q000150:complications; D008784:Methysergide / Q000627:therapeutic use; D008881:Migraine Disorders / Q000175:diagnosis / Q000188:drug therapy / Q000503:physiopathology; D011128:Polyradiculopathy / Q000150:complications; D011559:Pseudotumor Cerebri / Q000150:complications
chemical_list: D004878:Ergotamine; D008784:Methysergide