Eat Elovac after the black stool first consider the side effects of Elovac, Elovac contains iron and other trace elements, if inside the intestinal tract is not fully absorbed, discharged will cause the color of the stool black. When you have this symptom, first of all, we should exclude the color caused by gastrointestinal bleeding, stool depth will be black, in the first three days of taking this drug or three days after stopping these drugs, if there is still a black color of the stool, it is considered for the gastrointestinal tract has the possibility of bleeding. Need to take the stool for routine examination, occult blood test to clarify, occult blood test is positive, indicating that the stomach and intestinal bleeding, need to further understand whether the patient has stomach pain, abdominal pain and other symptoms and symptoms of the region, further to do electronic gastroscopy or electronic colonoscopy to clarify the site of bleeding.