Atherosclerosis stenosis less than 50% can use aspirin to avoid stenosis further aggravation, the specific use of drugs should follow the doctor’s instructions. Atherosclerosis is a vascular disease in which the walls of the arteries thicken, harden, lose elasticity, and the lumen narrows, and is common in middle-aged and elderly people. When atherosclerosis occurs in important blood vessels of various tissues and organs and leads to occlusion and rupture, it may cause serious consequences, such as cerebral atrophy, stroke, and limb necrosis. Atherosclerosis with less than 50% narrowing of blood vessels and no obvious discomfort such as panic, dizziness, etc. can be treated without medication, but it is necessary to pay attention to daily life to reduce the intake of fat, quit smoking and drinking. You can also use anticoagulant drugs such as aspirin under doctor’s guidance to avoid further aggravation of vascular sclerosis, such drugs can cause dyspepsia, bleeding and other adverse reactions, allergic to aspirin and salicylates, acute gastrointestinal ulcers, bleeding body, severe liver, kidney and heart failure and the last trimester of pregnancy and so on are prohibited. If atherosclerosis stenosis obvious discomfort such as panic, dizziness, etc. need to go to the hospital in time for diagnosis and appropriate treatment, under the guidance of a physician to use the drug.