Hello, I'm a healthcare professional with expertise in pharmacology. Omeprazole is a medication that belongs to the class of drugs known as proton pump inhibitors (PPIs). It is commonly used to reduce stomach acid in individuals with conditions such as gastroesophageal reflux disease (GERD), peptic ulcers, and other acid-related disorders. Like all medications, omeprazole can have side effects, which can vary from person to person. Common side effects of omeprazole may include: 1. Headache 2. Diarrhea 3. Nausea 4. Gas 5. Abdominal pain 6. Dry mouth Less common but more serious side effects can occur and may include: 1. Nutritional deficiencies, such as low levels of magnesium, calcium, or vitamin B12. 2. Bone fractures, particularly of the hip, wrist, or spine. 3. Kidney problems 4. **Inflammation of the pancreas (pancreatitis)** 5. Pneumonia 6. **Clostridium difficile-associated diarrhea** (CDAD), a potentially serious infection that can occur with antibiotic use. If you experience any severe or persistent side effects, it's important to consult with your healthcare provider. read more >>

Common side effects may include:fever;cold symptoms such as stuffy nose, sneezing, sore throat;stomach pain, gas;nausea, vomiting, mild diarrhea; or.headache.read more >>