Magnesium aluminum carbonate belongs to gastric mucosal protector and pantoprazole belongs to acid inhibitor, which can be taken together with gastric mucosal protector bismuth pectin for the treatment of duodenal bulb ulcer. When patients with duodenal ulcers, the mucosa of the intestinal wall is damaged, and gastric acid secretion will directly stimulate the duodenal mucosa, resulting in severe epigastric pain. Taking gastric mucosa protector magnesium aluminum carbonate and bismuth pectin can make the surface of intestinal mucosa form a protective film and protect the intestinal mucosa from gastric acid stimulation. Combined with acid suppressant pantoprazole can effectively reduce gastric acid secretion and promote intestinal wall recovery. Therefore, the three can be taken jointly and the three together will not have adverse drug reactions, but the patient should consult the physician before using the drug, under the guidance of the physician to use the drug, not self-selected drug therapy.