Taking cephalosporins generally will not appear black stools, it may be incorrect to take the drug to stimulate the stomach leading to bleeding and thus black stools, it may be at the same time with other drugs to take the reaction to make the stools black. Cephalosporins generally do not cause black stools, patients should first rule out whether their own gastric ulcer and other diseases that can cause upper gastrointestinal bleeding, you can go to the regular hospital for gastroscopy. If excluded is their own disease caused by black stool, may be consuming blood products food, such as duck blood pig’s blood, etc., resulting in black stool. When taking cephalosporins incorrectly for a long time, it may also irritate the stomach, causing bleeding and black stools. Or when taking cephalosporin, you also take other drugs orally to produce a reaction. It is recommended that patients go to the regular hospital for examination, clear cause and symptomatic treatment.