title: Venoconstrictor effect of dihydroergotamine in superficial hand veins.
mesh_terms: D000284:Administration, Oral; D004305:Dose-Response Relationship, Drug; D004878:Ergotamine / Q000008:administration & dosage / Q000494:pharmacology*; D006225:Hand / Q000098:blood supply*; D006801:Humans; D010646:Phentolamine / Q000494:pharmacology; D012039:Regional Blood Flow / Q000187:drug effects; D013997:Time Factors; D014662:Vasoconstrictor Agents / Q000494:pharmacology*; D014680:Veins / Q000187:drug effects*
chemical_list: D014662:Vasoconstrictor Agents; D004878:Ergotamine; D010646:Phentolamine