There is no such thing as long-term stomach medication without side effects. Common stomach medications include omeprazole capsules, aluminum sulfate tablets, domperidone tablets, and so on, all of which have certain side effects and are not recommended for long-term use. 1. Omeprazole capsules: a proton pump inhibitor, the main role is to inhibit the secretion of gastric acid, commonly used in duodenal ulcer, gastric ulcer and other diseases. Long-term use can lead to patients with abdominal distension, dyspepsia, constipation, gastric fundus gland polyps and other adverse reactions, generally not recommended for long-term use. It is prohibited to use if allergic and severe renal insufficiency. 2. Aluminum thioglycollate tablets: a kind of cytoprotective drug, has the effect of inhibiting pepsin and adsorbing bile salts, and is commonly used in the treatment of peptic ulcer and chronic gastritis. Long-term use can cause constipation, dry mouth, hypophosphatemia, dyspepsia and other adverse reactions, also not recommended for long-term use. It is contraindicated if the patient is allergic to the product or habitually constipated. 3. Domperidone Tablet: It is a potent peripheral dopamine receptor antagonist, which is commonly used clinically for the treatment of dyspepsia caused by various reasons. Its side effects include headache, dizziness, fatigue, diarrhea and other adverse reactions. Long-term overdose can lead to serious arrhythmia in patients with heart disease, patients over 60 years old and patients with tumors receiving chemotherapy. Such patients are advised to use this product with caution. If the above symptoms occur, it is recommended to go to a professional hospital for diagnosis, and stop the drug and treatment under the guidance of the doctor.