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Some side effects of omeprazole may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Omeprazole may cause a serious type of allergic reaction when used in patients with conditions treated with antibiotics. Call your doctor right away if you or your child has itching, trouble breathing or swallowing, or any swelling of your hands, face, or mouth.
Omeprazole may cause new or worsening symptoms of lupus. Tell your doctor if you have joint pain and a skin rash on your cheeks or arms that worsens in sunlight. You may be more likely to have a broken bone while taking this medicine long term or more than once per day.
Prolonged treatment (greater than 24-36 months) may cause vitamin B12 deficiency. The risk is greater in women, people younger than 30, and with higher dosages. PPIs (including omeprazole) have been associated with an increased risk of osteoporosis-related fractures of the hip, wrist, or spine.
Omeprazole (Prilosec) is usually well-tolerated, but it can cause headaches and stomach-related side effects, such as nausea, gas, or diarrhea. Long-term use can lead to more serious omeprazole side effects, such as infections or bone fractures.
If you get any of these symptoms, tell your doctor. Taking omeprazole for more than a year may increase your chances of certain side effects, including: bone fractures. gut infections. vitamin B12 deficiency – symptoms include feeling very tired, a sore and red tongue, mouth ulcers and pins and needles.
Updated on May 21, 2024. Key takeaways: Omeprazole (Prilosec, Prilosec OTC) is a proton pump inhibitor (PPI) that’s used to treat several digestive conditions. These include heartburn and gastroesophageal reflux disease. Omeprazole comes as an over-the-counter (OTC) and prescription medication.