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An antihemorrhagic (antihæmorrhagic) agent is a substance that promotes hemostasis (stops bleeding). It may also be known as a hemostatic (also spelled hæmostatic) agent. A styptic (also spelled stiptic) is a specific type of antihemorrhagic agent that works by contracting tissue to seal injured blood vessels. Styptic pencils contain astringents. Antihemorrhagic agents used in medicine have various mechanisms of action: * Systemic drugs work by inhibiting fibrinolysis or promoting coagulation. * Locally-acting hemostatic agents work by causing vasoconstriction or promoting platelet aggregation. == Systemic == There are several classes of antihemorrhagic drugs used in medicine. These include antifibrinolytics, blood coagulation factors, fibrinogen, and vitamin K. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Antihemorrhagic」の詳細全文を読む スポンサード リンク
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