Omeprazole enteric-coated capsule is useful for stomach pain caused by gastric ulcer and reflux esophagitis, but not so useful for stomach pain caused by other diseases such as chronic gastritis and functional dyspepsia. Omeprazole enteric-coated capsule is a kind of proton pump inhibitor, can play a role in inhibiting the secretion of gastric acid, can be used for the treatment of reflux esophagitis, gastric ulcer, duodenal ulcer and other diseases caused by stomach pain. In addition, chronic gastritis, functional dyspepsia, cholecystitis and other diseases can also cause stomach pain, but for this kind of disease, the application of omeprazole enteric-coated capsules such as acid suppression agent does not have much effect. The cause of stomach pain is different, the corresponding medication program also has some differences. It is recommended that patients consult a doctor as soon as possible to confirm the diagnosis, under the guidance of the doctor for the use of medication, do not arbitrarily apply the drug.