Kidney failure should not use Renal Failure Ning for a long period of time, otherwise it is easy to affect the efficacy of the drug and even cause drug poisoning. Renal Failure Ning belongs to the combination of many ingredients of proprietary Chinese medicines, Renal Failure Ning contains rhubarb, which can clear away heat and detoxification (remove heat and toxicity in the body), and calm down the five organs, so as to slow down the progress of chronic renal failure, which contains safflower and danshen ingredients have the effect of activating blood circulation and removing blood stasis (promote blood circulation and eliminate blood stasis in the body), which can improve the anemia of patients with renal failure as well as redundancy of bruises. Appropriate use of the drug in chronic renal failure can inhibit glomerulosclerosis. However, the drug contains Fangzhong Half-sia, when taken for a long time, it will accumulate toxin in the kidney area, when the toxin reaches a certain level, it can cause drug poisoning. The method of use and dosage of the drug should strictly follow the doctor’s instructions, do not blindly take a large amount of unauthorized, prolonged use.