Objective: To research antithrombotic effect and mechanism of total saponins of Astragalus (TSA).Methods: Effects of TSA on artery thrombosis anud platelet aggregation were studied, at dosage of 50,100,200mg/kg. And level of TXA 2,PGI 2 in plasma, content of NO in serum of rats were determined.Results: TSA could restrain artery thrombosis and platelet aggregation of rats, and increase PGI 2 and NO.Conclusion: There was apparently antithrombotic effect of TSA.
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