Taking stomach medicine black stool may be due to drug factors, dietary factors, gastrointestinal bleeding and other reasons, it is recommended to carry out routine examination of the stool, and for drug factors, dietary factors caused by black stool, do not need special treatment, but patients with gastrointestinal bleeding need to fast, if necessary, choose omeprazole, growth inhibitors and other drugs, endoscopy or interventional therapy. 1. Drug factors: if the stomach medicine contains iron, bismuth, such as ferrous sulfate, bismuth citrate potassium, etc., during the period of taking the drug may cause black feces, generally stop taking the drug can gradually disappear, do not need special treatment. 2. Food influence: during the period of taking gastric drugs, if you eat some animal liver, blood products, such as: pig liver, pig blood, etc., may also cause black stool phenomenon, but this is a normal phenomenon, after not eating the above food, the stool will gradually return to normal. 3. Gastrointestinal bleeding: For patients suffering from gastrointestinal bleeding, it will also be manifested as black stools, which may be accompanied by abdominal pain, abdominal distension, dizziness, fatigue and other uncomfortable symptoms. Conduct routine stool examination with gastrointestinal bleeding, mostly occult blood, determined to be suffering from gastrointestinal bleeding should be fasting, if necessary, omeprazole, growth inhibitors and other drugs, endoscopy or interventional therapy. After taking gastric drugs, the stool is black, it is recommended to go to the hospital in time to determine whether there is organic lesions, for the cause of the treatment.