Omeprazole can have a strong and long-lasting inhibitory effect on gastric acid secretion, which can reduce the stimulation of gastric acid on the gastric mucosa, so there is a phenomenon that once you eat omeprazole stomach is comfortable. Omeprazole is a proton pump inhibitor, after oral administration, it can specifically and irreversibly bind with the sulfhydryl group of H⁺-K⁺-ATPase in the secretion membrane of the mural cells to generate the complex of sulfinamide and proton pump, thus inhibiting the activity of the enzyme and blocking the secretion of gastric acid, and it has an inhibitory effect on the secretion of gastric acid caused by various reasons. Omeprazole is indicated for the treatment of gastric ulcers, duodenal ulcers, stress ulcers, reflux esophagitis, and Drewe-Ayer syndrome. Adverse reactions such as diarrhea, headache, abdominal pain, constipation, rash, dizziness, somnolence, and insomnia may occur with the use of this product and usually resolve spontaneously. Nursing women should be cautious, pregnant women, allergic to the product, severe renal insufficiency and infants and children are prohibited. Patients who want to use Omeprazole are advised to go to a regular hospital and consult a professional doctor to avoid blind use of medication.