He cautions against people taking both types of drug together at this stage as each can increase the risk of gastric bleeding — combined, the risk could be even greater. (newscientist.com)
The specific anti-inflammatory chemicals eicosanoids, mentioned above, have similar effects to aspirin, but without downsides such as gastric bleeding. (foodpyramid.com)
A common source of bleeding is from gastric or duodenal ulcers (usually gastric bleeding would give vomit containing blood); other causes of black faeces may be due to eating food containing blood, tumours, clotting disorders, poisoning or foreign bodies. (wagwalking.com)