Omeprazole enteric capsules are proton pump inhibitors, also known as H+/K+-ATP pumps. It is mainly concentrated in an acidic environment and is a fat-soluble, weakly alkaline drug that acts specifically on the cells of the gastric mucosal wall and has a very powerful inhibitory effect on gastric acid secretion. The main usage can be administered orally or intravenously for the treatment of duodenal ulcer once a day at 20 mg once a day for 2-4 weeks. For the treatment of Drosophila syndrome, the initial dose is 60 mg once daily, and more than 90% of patients can control symptoms with 20-120 mg per day, if the dose is greater than 80 mg per day, the dose should be divided into 2 doses. For the treatment of reflux esophagitis, the dose is 20-60mg per day. for the treatment of bleeding peptic ulcer, 40mg is given intravenously once every 12 hours for 3 days. For the treatment of omeprazole, attention needs to be paid to the possible side effects, which are usually mild transient diarrhea, nausea, constipation, upper abdominal pain, and some mild abnormal headache, dizziness, drowsiness, insomnia and peripheral neuritis in the nervous system.