It has significant efficacy in ischemic cardiovascular diseases. The key to improve the efficacy is to correctly grasp the basis of medication. From the perspective of Western medicine, myocardial ischemia is mainly caused by elevated blood lipids, resulting in narrowing of blood vessel lumen and insufficient blood supply to the heart muscle. From the perspective of Chinese medicine, most of the myocardial ischemia is caused by phlegm dampness and blood stasis, phlegm dampness is equivalent to the concept of blood lipid in western medicine, and the myocardial ischemia caused by blood stasis is characterized by tingling in the precordial area and purple tongue and lips. Therefore, Tongue & Vein Granules can only treat myocardial ischemia caused by blood stasis, and is not effective for myocardial ischemia caused by high blood lipids. Blood stasis can not only lead to myocardial ischemia, but also lead to insufficient blood supply to the brain, so Tong Vai Granules must have a purple tongue and lips to treat ischemic cardiovascular diseases, otherwise it should be used with caution.