Magnesium aluminum carbonate tablets, also known as Daxil, is a drug that neutralizes stomach acid. When there are digestive system diseases such as gastritis, duodenitis, gastric ulcer, duodenal ulcer, the patient’s stomach acid secretion is increased. The patient will have symptoms such as acidity and heartburn when there is a long-term storage of stomach acid in the stomach. After taking magnesium aluminum carbonate tablets orally, it will neutralize this stomach acid and cause the patient’s symptoms to be reduced. Omeprazole is a proton pump inhibitor commonly used in clinical practice, which has the function of inhibiting stomach acid. It is not neutralizing gastric acid, it is inhibiting gastric acid secretion by cells in the stomach lining. Therefore, it is more effective to use omeprazole or proton pump inhibitor for patients with increased gastric acid secretion. Magnesium aluminum carbonate tablets, mainly to protect the gastric mucosa, omeprazole has a stronger effect of inhibiting gastric acid, which is the difference between the two.