The full name of charcoal tablet is medicinal charcoal tablet, the principle of reducing creatinine is that medicinal charcoal tablet has adsorption effect, after taking it, the toxin is absorbed in the intestine and excreted through the stool. The amount of creatinine it can reduce varies from person to person, some patients may reduce 40 or 50 μmol/L, some patients may only reduce 20 or 30 μmol/L. When taking this drug, in order to improve the effect of creatinine reduction, usually combined with other detoxification drugs, such as urinary toxicity Qing granules and Haikun kidney hi capsule. The combination of medicinal charcoal tablets and urinary toxin clear granules has certain benefits, because medicinal charcoal tablets may cause constipation while taking them, while urinary toxin clear granules have certain laxative effects, so the two are complementary when applied together. The application of medicinal charcoal tablets to reduce creatinine is mainly for patients with chronic renal failure, but it should be emphasized that even if patients with chronic renal failure apply the above-mentioned detoxification drugs, the creatinine reduction is not very obvious, and the main purpose of treatment is to prevent the creatinine from growing too fast.