herbal preparation of Astragalus membranaceus (Fisch.) Bunge. (Leguminosae), Panax ginseng C. A. Mey (Araliaceae), Glycyrrhiza uralensis Fisch. (Leguminosae), and Cinnamomum cassia Presl. (Lauraceae) used to treat coronary heart disease, aplastic anemia, and chronic renal faliure; inhibits CYP2C9, CYP2E1, and CYP3A4