Uncaria rhynchophylla is sweet in taste, slightly cold in nature, and belongs to the liver and pericardium meridian. Uncaria rhynchophylla has the effects of calming wind, relieving spasm, clearing heat and calming liver. Uncaria rhynchophylla can improve blood circulation, adjust blood volume at any time, and deliver it to important organs of human body, such as heart, to ensure adequate and timely blood supply. This medicine has toxic side effects. Excessive use can lead to death, especially for the heart, liver and kidneys. Therefore, we should pay attention to the examination of liver and kidney function when taking large doses or taking them for a long time.