Omeprazole is a PPI preparation, mainly an acid suppressant, which can inhibit gastric acid secretion and reduce gastric acid irritation to gastric mucosa, and has obvious effects on relieving some symptoms such as acid reflux, heartburn and stomach pain. Daxil is a mucosal protective agent, which can form a protective layer on the surface of gastric mucosa and can reduce the damage of gastric acid, bile salts or other factors to gastric mucosa. Omeprazole and Daxil are often used together to control some diseases such as gastritis, peptic ulcer, and even esophagitis to relieve patients’ common clinical symptoms such as reflux, heartburn, and stomach pain, and is one of the commonly used drugs in clinical practice.