An LDL of 4.7mmol/l, which is outside the normal range is an elevated level and normally requires lipid-lowering medication. Low-density lipoprotein (LDL) normal range ≤ 3.4mmol / l, 3.4 ~ 4.1mmol / l for the marginal level, > 4.1mmol / l for the elevated level. LDL is a risk factor for atherosclerosis, and its increased level is positively correlated with the development of coronary heart disease. Elevated LDL can be treated with lipid-lowering drugs such as statins (simvastatin and lovastatin), ezetimibe, probucol, and lipitor. It is recommended that patients with abnormally elevated LDL levels go to the hospital in time to receive standardized treatment under the guidance of the doctor, and the use of medication should be in accordance with the doctor’s instructions.