Omeprazole: 1. For the treatment of gastric ulcer or duodenal ulcer, 20mg per dose, once a day, orally in the morning, the course of treatment is about 2-8 weeks. 2. For the treatment of reflux esophagitis, 20-60mg per day, once a day. 3. For the treatment of Zhuo-Ai syndrome, the starting dose is 60mg/d, after that the maintenance dose can be 20-120mg per day, the daily The maximum dose is 80mg, which can be given in 2 doses. Adverse effects of omeprazole may include abdominal distention, vomiting or dizziness, and decreased sleep.