Nicotinic acid.
D001775:Blood Circulation / Q000187:drug effects; D004347:Drug Interactions; D006801:Humans; D009539:Nicotinic Acids / Q000494:pharmacology*; D014662:Vasoconstrictor Agents / Q000494:pharmacology
D009539:Nicotinic Acids; D014662:Vasoconstrictor Agents