The main ingredient of Vein and Blood Capsules is leechin, which is an anticoagulant component extracted from leech saliva tissue and is the safest and most effective anticoagulant available. Main efficacy: Hirudin can inhibit blood coagulation, and also inhibit the function of platelets and reduce the viscosity of blood, thus preventing thrombosis. Main effects: 1, treatment of lower limb deep vein thrombosis and cerebral infarction, pulse blood Kang can fight against thrombosis, increase blood circulation in ischemic areas and eliminate swelling of limbs. 2, treatment of angina pectoris, pulse blood Kang capsule can relieve spasm of heart vessels and promote blood supply to coronary arteries, thus relieving angina pectoris.