Rice is a good substitute. If flatulence is a concern, see your doctor to determine if you are lactose intolerant. Identify offending foods. Reduce or eliminate these gas-forming foods from your diet. Activated Charcoal may provide some benefit.
Bacterial infection is the most common cause of duodenal ulcers.
Stomach ulcers are often a side effect of pain killers and anti-inflammatory drugs used primarily to treat arthritis. Alcohol ingestion, cigarette smoking, and emotional stress may also influence the development of an ulcer or interfere with its healing. Upper abdominal pain is the most common symptom of ulcers, but many ulcers cause no symptoms at all. Very serious ulcer disease may also cause a blockage between the stomach and small intestine and this complication results in persistent vomiting. Severe pain results from the most urgent complication of ulcers - peritonitis caused by a tear through the wall of the stomach or duodenum.