A decrease in creatinine generally refers to a patient with abnormal renal function that has recovered with treatment, called a decrease in creatinine value, and is a sign that the disease is improving. The most commonly applied clinical markers of acute renal function abnormalities are urea nitrogen and creatinine values. The most commonly used clinical kidney-protective drugs are Bailing Capsules, RenFuKang, Urotoxic Clear Granules, compound alpha keto acid, medicinal charcoal, ferrous succinate, erythropoietin and oral Chinese medicine or renkang suppositories to expel intestinal toxins. Clinically, abnormal renal function can be divided into acute renal failure and chronic renal failure. Acute renal failure creatinine decreases when it drops to normal, indicating complete recovery of renal function. Chronic renal failure creatinine drop indicates that the kidney function has been partially relieved, but will not return to normal, indicating that the current treatment is effective, continue treatment, do not stop the drug.