Headaches that could spell trouble.
D004087:Dihydroergotamine / Q000627:therapeutic use; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D008881:Migraine Disorders / Q000188:drug therapy*; D018170:Sumatriptan / Q000627:therapeutic use
D004087:Dihydroergotamine; D018170:Sumatriptan