Atorvastatin can be taken throughout the day, but it is usually recommended that Atorvastatin be taken at night before bedtime. Atorvastatin belongs to the statin class of drugs and is mainly used in the treatment of vascular atherosclerosis and hyperlipidemia. The main mechanism of action of statins is the inhibition of hydroxymethylglutaryl coenzyme A (HMG-CoA) reductase, and such enzymes are more active during sleep at night, so taking statins at night can better fulfill the pharmacological effect of reducing cholesterol synthesis. Close monitoring is required during the course of administration. This drug may cause adverse reactions such as headache, rash, dizziness, blurred vision, taste disturbances, and occasionally abnormalities in liver function, causing elevated aminotransferases, and in a small percentage of patients, insomnia. Rarer adverse reactions include dermatomyositis, myalgia, and rhabdomyolysis, which is characterized by muscle pain, weakness, and fever. There is also a possibility of renal failure, but it is relatively rare. So taking him atorvastatin, in addition to paying attention to the time of taking, also need to regularly review liver function, blood lipid levels, creatine kinase and other indicators, in order to prevent the emergence of drug-related side effects. Please follow the doctor’s instructions for specific medication, and do not take it blindly on your own.