What’s with the black stool from the stomach pills?

Possible reasons for taking stomach pills for black stools include: the occurrence of gastrointestinal bleeding, the need for drugs such as octreotide to stop bleeding, blood transfusion, surgery and other treatments; taking medications with black stool color, such as bismuth potassium citrate, and so on.
1. Gastrointestinal bleeding: patients with gastric diseases, black stools need to exclude whether there is gastrointestinal bleeding, if at the same time dizziness, fatigue, vomiting blood, abdominal pain, etc., you need to consult a doctor in a timely manner, improve the blood and stool routine and other tests, diagnosed with the use of octreotide under the guidance of the doctor to stop the bleeding of medicines, and in serious cases, also need to be transfused in a timely manner, endoscopy or surgical hemostasis.
2. Drug effects: gastrointestinal drugs such as bismuth potassium citrate and bismuth pectin are commonly used in the treatment of gastric and duodenal ulcers, erosive gastritis, etc. During the period of medication, the mouth often smells of ammonia, the tongue and stools are grayish-black, and the number of stools increases, and the stool can be restored to normal after stopping the medication.
If there is no clear relationship between the black stool and the drug must promptly consult a doctor to investigate gastrointestinal bleeding, to avoid delaying the condition.