The most common side effects of Omeprazole Enteric Capsules are headache, nausea, vomiting, diarrhea, constipation, insomnia, and rash. Omeprazole Enteric Capsules are mainly used to treat gastric ulcers, duodenal ulcers, reflux esophagitis and stress ulcers. Avoid chewing when taking it, so as not to affect the therapeutic effect of the drug. Omeprazole Enteric Capsules side effects include gastrointestinal irritation reactions in addition to the aforementioned abdominal pain, flatulence or loss of appetite. Some patients also experience dizziness, headache, insomnia and so on. Allergic reactions such as dyspnea may even occur. A very small number of patients may experience increased serum aminotransferase and so on. However, most of the adverse reactions can disappear on their own, if there are serious situations such as allergic reactions need to consult a doctor in time. Omeprazole enteric-coated capsules should be contraindicated for those who are allergic to omeprazole enteric-coated capsules, those who are allergic to other benzimidazoles and their components, those with hepatic or renal insufficiency, and infants and young children. In addition, pregnant and lactating women should use it with caution. If patients have the need for medication, it is recommended to follow the doctor’s instructions, avoid blind use of medication or change the dosage, so as not to cause discomfort.