Essential medication for gastroenteritis can have Omeprazole. Omeprazole is a clinically used proton pump inhibitor that inhibits the secretion of gastric acid, thereby reducing mucosal damage and alleviating the symptoms of acid reflux and heartburn in patients. It is mainly used to treat gastritis and gastric ulcers, duodenal ulcers, stress ulcers, reflux esophagitis, and Droe-Ayer syndrome. Omeprazole and bismuth pectin can also kill Helicobacter pylori when combined with amoxicillin and clarithromycin, or with metronidazole and clarithromycin. The side effects of omeprazole are relatively minor and therefore it is widely used in clinical practice. If stomach discomfort occurs, it is recommended to consult a doctor in time, clarify the cause of the disease with the help of a doctor, and carry out targeted treatment or therapy, not blindly use drugs on their own.