What are the oral hemostatic drugs?
Oral hemostatic agents are medications that exert a coagulation and hemostatic effect within a short time after oral administration. These drugs primarily achieve hemostasis by enhancing endogenous procoagulant factors or inhibiting anticoagulant factors, thereby promoting blood clot formation.
What Are the Commonly Used Oral Hemostatic Agents?
1. Agents That Reduce Capillary Permeability
These agents enhance capillary resistance to injury, thereby decreasing capillary permeability and promoting vasoconstriction of damaged capillaries to achieve hemostasis. An example is pituitrin (posterior pituitary extract), a water-soluble component extracted from the posterior lobe of porcine or bovine pituitary glands. It is indicated for postpartum hemorrhage due to uterine atony, bleeding from ruptured varicose veins, and pulmonary hemorrhage.
2. Antifibrinolytic Agents
These agents inhibit activators of plasminogen, preventing its conversion into plasmin, thereby suppressing fibrin degradation. Commonly used agents include tranexamic acid—indicated for hemorrhage following trauma or surgery involving the lungs, brain, urinary tract, or prostate—and aminomethylbenzoic acid (AMBA), which is primarily used for bleeding associated with benign prostatic hyperplasia or upper gastrointestinal bleeding.
3. Agents That Improve or Enhance Coagulation Factor Activity
For example, vitamin K1 (phytonadione) is an essential cofactor for hepatic synthesis of prothrombin and other vitamin K–dependent clotting factors. It is mainly used to treat bleeding caused by obstructive jaundice or biliary fistula.
4. Traditional Chinese Medicine (TCM) Preparations
Examples include Yunnan Baiyao, a well-known TCM hemostatic formula.
The above outlines the major categories of oral hemostatic agents. Although numerous options exist, it is imperative to strictly follow medical advice when using these medications—ensuring cautious, rational, and health-conscious use. We hope this information has been helpful to you.
