Omeprazole enteric-coated capsule side effects are relatively minor. The main manifestations are gastrointestinal reactions, liver function abnormalities, neuropsychiatric system symptoms and so on. 1. Gastrointestinal reaction: it is the most common side effect, which may include heartburn, nausea, vomiting, acid reflux, abdominal distension, abdominal pain, diarrhea and so on. 2. Liver function abnormalities: may cause a slight transient elevation of bilirubin, which can slowly decrease to normal without treatment. 3. Neuropsychiatric symptoms: may lead to dizziness, headache, insomnia, drowsiness, etc.. If the above gastrointestinal reactions, liver function abnormalities, neuropsychiatric symptoms occur after taking omeprazole enteric-coated capsules, they can usually be relieved on their own, and the need to stop the drug should be determined by medical advice. However, if fever, shock, dyspnea and other symptoms occur, immediate medical attention should be sought.