title: A classification of headache.
mesh_terms: D000928:Antidepressive Agents / Q000627:therapeutic use; D001007:Anxiety; D001167:Arteritis; D001241:Aspirin / Q000627:therapeutic use; D003863:Depression; D004876:Ergot Alkaloids / Q000627:therapeutic use; D005156:Facial Neuralgia; D006261:Headache / Q000145:classification* / Q000188:drug therapy; D006636:Histamine Release; D006801:Humans; D007249:Inflammation; D008784:Methysergide / Q000494:pharmacology / Q000627:therapeutic use; D008833:Microcirculation; D008881:Migraine Disorders / Q000188:drug therapy; D009119:Muscle Contraction; D009220:Myositis; D009333:Neck; D009437:Neuralgia; D010003:Osteoarthritis; D012535:Scalp; D012702:Serotonin Antagonists; D014653:Vascular Headaches; D014662:Vasoconstrictor Agents / Q000627:therapeutic use
chemical_list: D000928:Antidepressive Agents; D004876:Ergot Alkaloids; D012702:Serotonin Antagonists; D014662:Vasoconstrictor Agents; D001241:Aspirin; D008784:Methysergide