About omeprazole
Proton pump inhibitor
Used for
- Heartburn and acid reflux
- Stomach or duodenal ulcers
- H. pylori infection, with other medicines
- Preventing ulcers from certain painkillers
Usual adult dose
Usually 20 mg once daily; dose and duration depend on the condition.
Usual dose in children
For reflux or ulcers, typically 10–20 mg once daily for children aged 1 year or older; specialist guidance may be needed.
Common side effects
- Headache
- Abdominal pain, nausea, or diarrhoea
- Constipation or wind
- Long-term use may lower magnesium or vitamin B12
Important warnings
- Seek assessment for trouble swallowing, unexplained weight loss, vomiting blood, or black stools.
- Long-term use may increase fracture, gut infection, and nutrient deficiency risks.
- May mask symptoms of serious stomach illness.
- Capsules may contain ingredients unsuitable for some dietary restrictions.
Pregnancy
Often used when needed, but discuss benefits and risks with a healthcare professional.
Breastfeeding
Small amounts may pass into milk; use when clinically appropriate.
Interactions
- Clopidogrel: omeprazole may reduce its effect.
- Warfarin, phenytoin, or digoxin: blood levels or effects may change.
- Some HIV medicines and antifungals: levels or effectiveness may change.
- Methotrexate: omeprazole may increase its levels.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.