Oxy is short for omeprazole, which belongs to the class of proton pump inhibitors, the main effect is to inhibit gastric acid, through the inhibition of hydrogen potassium ATPase to achieve the effect of inhibiting gastric acid secretion, is a common drug for upper gastrointestinal tract diseases, such as acute and chronic gastritis, manifested as having excessive gastric acid, acid reflux, heartburn, and acute gastric mucosal lesions, upper peptic ulcers, compound ulcers, stress ulcers, reflux esophagitis, bile reflux gastritis and esophageal reflux, which are functional disorders with no abnormalities detected by gastroscopy. However, there are manifestations of acid reflux, heartburn, etc. It can also be used as a preventive medicine, mainly for the possible development of upper gastrointestinal diseases, and intervention to reduce the production of gastrointestinal diseases, such as long-term use of non-steroidal, hormonal drugs, etc. Omeprazole, as a type of proton pump inhibitor, is also one of the common drugs used to treat H. pylori.