Conclusions Huangqixianxiong capsule has a better effect on EISH without apparent toxic and side effects, and the regulation of NOS, MDA, NPY and Hey may be included in its mechanism of action.

• 结论黄芪陷胸胶囊对老年单纯收缩期高血压有较好的疗效且无明显毒副作用，可调节血清一氧化氮合酶活力、降低血清丙二醛水平及血浆神经Y肽和同型半胱氨酸浓度。