When blood creatinine decreases from 240μmol/L to 170μmol/L, medication is usually needed because there is still impaired renal function at this time. Normally, the normal value of blood creatinine in normal adults is 53~106μmol/L for men and 44~97μmol/L for women. When the patient’s blood creatinine value is 170μmoI/L, it still suggests the existence of renal function impairment, and the condition has not yet been significantly relieved, so it is not recommended that the patient stop taking the medicine without authorization. It is suggested that the patient should go to the hospital to improve the renal function, renal ultrasound and other related examinations in time, and standardize the treatment under the guidance of the doctor and follow up regularly. Blood creatinine value is one of the indicators to reflect the condition of kidney, but we can not completely rely on the blood creatinine value to determine whether to stop taking medication, it is recommended that patients seek medical treatment in a timely manner, follow the doctor’s instructions to standardize the treatment, do not take medication or stop taking medication without authorization.