Objective:To detect the anticoagulation and antiplatelet effects of different concentrations of puerarin,heparin sodium and tirofiban hydrochloride on the blood samples of healthy volunteers by Sonoclot coagulation and platelet function analyzer.Methods:Peripheral blood samples were extracted from 20 healthy volunteers,followed by adding different concentrations of puerarin,heparin sodium and tirofiban hydrochloride.Samples were detected for activated clotting time (ACT),clot rate (CR) and platelet function (PF) by Sonoclot coagulation and platelet function analyzer instrument.Results:For puerarin and heparin sodium,the values of ACT gradually increased,and the values of CR and PF gradually decreased with increasing in drug concentration.There was a linear (or log linear) relationship between ACT,CR,PF value and drug concentration (P＜0.01).Corresponding to each value,a regression equation was obtained.For tirofiban hydrochloride,the values of ACT and CR had no significant changes,while PF values gradually decreased with concentration increasing.There was also a linear relationship between PF values and concentrations of tirofiban hydrochloride (P＜0.01).Under the same ACT values,the puerarin corresponding CR values (CR =e-0.0062ACT+4.31,P＜2.2e-16) were always higher than the corresponding values (CR =e-0.0028ACT+2.79,P-value＜2.2e-16) of heparin sodium.For high concentrations of puerarin (e.g.3.8 mg/600 iμ L) and tirofiban hydrochloride (e.g.0.8 μ g/600 μ L),PF values had no significant difference.However,PF values for high puerarin concentration had a larger variance.Conclusions:Puerarin has similar anticoagulant and antiplatelet effects with the heparin sodium,and may have a lower hemorrhage risk than heparin sodium when obtained the same anticoagulation effect in the concentration range of this experiment.In addition,for high concentration,puerarin had the same antiplatelet function as tirofiban hydrochloride but with a larger individual variability.