LDL cholesterol 5.42mmol/L is more serious, patients need to pay attention. 1. Long-term elevation of LDL cholesterol will increase the risk of cardiovascular and cerebrovascular diseases, triggering myocardial infarction, cerebral infarction, etc., which seriously affects the quality of life of patients. 2. The normal range of LDL cholesterol is ≤3.4mmol/L, so LDL cholesterol of 5.42mmol/L is more serious. Patients can control their LDL cholesterol level by improving their lifestyle and taking lipid-lowering drugs. 3. The general population with high LDL cholesterol should firstly improve their life style, adjust the dietary structure, eat less or no high cholesterol and high calorie food, eat more fresh vegetables and fruits, avoid smoking and alcohol. When dietary adjustments still fail to control LDL cholesterol levels, lipid-lowering drugs such as simvastatin tablets, rivastigmine tablets, fluvastatin tablets, etc., should be used under the guidance of a doctor. 4. In addition, patients who are obese, combined with hypertension, diabetes mellitus or cardio-cerebral vascular diseases such as myocardial infarction and cerebral infarction should start taking oral lipid-lowering drugs immediately when their LDL cholesterol level is 5.42 mmol/L. The LDL control requirements of such patients are more stringent, usually need to <2.6mmol/L, some patients even need to <1.8mmol/L. Warm tips: LDL cholesterol 5.42mmol / L is more serious, patients need to pay attention, if necessary, under the guidance of a doctor to take lipid-lowering drugs.