Atorvastatin 10mg adjusted to 5mg effect will be reduced, under normal circumstances is not recommended to take 5mg/day oral dose. The main effect of atorvastatin is to lower cholesterol, and also has the effect of stabilizing plaque, patients with hyperlipidemia and cardiovascular disease can be taken, according to the instructions of the drug, the starting dose of atorvastatin is 10mg/day, if the condition requires, the dose can be gradually increased, so it is not recommended to reduce the dosage without authorization. Atorvastatin may cause adverse reactions such as rhabdomyolysis and transaminase abnormalities during the use of atorvastatin, and allergy to the drug, severe active liver disease, and pregnancy are contraindications to the drug. When taking atorvastatin orally in the clinic, it is important to comply with the doctor’s orders and the instructions of the drug, and to avoid adjusting the dosage casually, so as not to lead to the decrease of the efficacy of the drug, which affects the clinical treatment.