Acori Tatarinowii Rhizoma Acori Tatarinowii Rhizoma is the dried rhizome of Acorus tatarinowii Schott, family Araceae. It can improve cognitive learning and memory, anti-dementia, and anti-depression. Volatile oil, beta-asarone and extracts prepared by various methods have protective effect on ischmia/reperfusion injury of rats brain cells. Acori Tatarinowii Rhizoma can inhibit the normal and induced contraction of intestinal smooth muscle. alpha-asarone and beta-asarone have anti-asthma activity. Acori Tatarinowii Rhizoma volatile oil can inhibit aconitine, adrenaline and barium chloride induced arrythemia. It also can inhibit several kinds of bacteria and dermatophyte. Pungent and bitter in flavor, warm in nature. Enter heart, spleen, and stomach channels. Open orifices, induce resuscitation, calm heart and mind, resolving dampness and regulate stomach.