RESUMEN
<p><b>OBJECTIVE</b>To find a good way to diagnose VD, value the effect of Yishen Yangnao capsule on VD and try to find some rules of changes in Chinese medicine syndromes.</p><p><b>METHOD</b>Patients were randomly divided into treating group and western medicine comparison group. It's the phase III clinical research of Rishen Yangnao capsule curing VD, judging the validity and security of it, using dukexi slice as comparison drug. Some of the patients did the examination of P300.</p><p><b>RESULT</b>The total validity of Yishen Yangnao capsule is 56.3% (contract team is 60.0%). The improve rate of ADL is 0.1069% (contract team is 0.1134%). The scores of Chinese medicine syndrome descend.</p><p><b>CONCLUSION</b>Yishen Yangnao capsule has the same effect as dukexi slice in curing VD at the side of intelligence situation and life ability.</p>