It is normal for stools not to be black after taking colloidal bismuth pectin capsules. Colloidal bismuth pectin capsule belongs to the gastric mucous membrane protection agent, in the clinical mainly used for the treatment of chronic gastritis, peptic ulcer, Helicobacter pylori infection caused by related superficial gastritis or chronic atrophic gastritis. Colloidal bismuth pectin capsule after taking the stool is not black, may be due to taking the drug for a shorter period of time, so the stool did not immediately turn black, or eat too much green vegetables, there is a large amount of chlorophyll and feces mixed with the stool to cover the color of the stool, so did not turn black, these are usually normal phenomena. Some patients take a smaller dose, also does not necessarily discharge black stool, is also a normal phenomenon. Colloidal bismuth pectin capsule part of the population after taking the phenomenon of black stool, usually is also normal, do not need special treatment, usually after stopping the drug can return to normal. Taking colloidal bismuth pectin capsules should be taken in accordance with the dose, usually does not cause adverse reactions of the liver, kidney, nervous system, but note that severe renal insufficiency is prohibited, it is recommended that the use of the drug under the guidance of a physician.