RESUMEN
<p><b>OBJECTIVE</b>To observe the effect of the crude extracts of Dan-shen root and San-qi of different proportion on platelet aggregation and adhesion in normal rabbits.</p><p><b>METHOD</b>With rabbits, ig. (4d, exsanguinated via carotid artery, percentage of platelet aggregation and adhesion was measured.</p><p><b>RESULT AND CONCLUSION</b>Aspirin (4.4 mg/Kg) could markedly inhibit platelet aggregation and adhesion in normal rabbit. The proportions of Dan-shen root/San-qi (10:0, 10:1, 10:3, 10:6, 1:10) could markedly inhibit platelet aggregation, among which 10:3 was the best. San-qi alone had little effect on aggregation. The proportions of Dan-shen root/San-qi (10:3, 10:6, 0:10) could markedly inhibit platelet adhesion, among which 0:10 was the best, and the proportions(10:0, 10:1, 1:10) had little effect.</p>