Omeprazole belongs to the proton pump inhibitors commonly used in clinical practice, mainly regulates the secretion of gastric acid in human body, so as to achieve the effect of preventing and treating ulcer disease. 1. It has the effect of inhibiting the secretion of gastric acid, which can inhibit the secretion of gastric acid in normal people or patients with ulcer disease for a long time. 2. It plays a protective role against the damage of gastric mucosa caused by taking aspirin and other drugs. 3. It can treat ulcer disease, which can be achieved by enhancing the antibacterial It can treat ulcer disease by enhancing the clearance of H. pylori by antibacterial drugs.