Medicinal charcoal tablets can achieve some creatinine-lowering effect. Medicinal charcoal is a kind of adsorbent, which can adsorb small molecules of toxins in the intestinal tract, including creatinine and urea nitrogen, and also potassium ions through physical action. Therefore, medicinal charcoal tablets can not only achieve the effect of lowering creatinine, but also the purpose of lowering potassium. But medicinal charcoal creatinine lowering is only symptomatic treatment, and it can not solve the cause of kidney failure of patients. Therefore, if you have elevated creatinine, you should go to the hospital for treatment and examination as early as possible to clarify the cause of kidney failure and actively treat it according to the cause. In addition, taking medicinal charcoal tablets can also cause side effects, such as bloating and constipation, which may require discontinuation of the drug.