What is the reason for eating stomach medicine stool black

What is the reason for eating stomach medicine stool black: clinically, there is only one kind of stomach medicine that can easily show black stool after eating, that is, bismuth citrate agent, which contains a large amount of bismuth agent, the color of bismuth agent is black, and stool is dark black and not black shiny, this is the result caused by drugs. Digestive tract bleeding shows black stool often black shiny or tarry black stool, and drug caused black stool is not the same, want to confirm whether the drug can be considered to improve the stool routine examination, clear whether there is occult blood or red blood cells can be diagnosed basically. The patient showed black stool after oral stomach medicine, considering the following factors: 1. If the patient's oral medicine is pectin secret and iron, and recently overate some black foods such as mulberry, blood products and animal liver, it will cause the patient's stool to be black, which is a relatively normal phenomenon, can not be treated. 2. Considering that this kind of black stool is caused by erosion and bleeding of the upper digestive tract of the patient, it needs to be paid attention to by the patient. It should be further examined by gastroscope in the hospital to make sure whether there are abnormal lesions.