How does omeprazole work?
Omeprazole blocks an enzyme in the stomach that produces acid. By reducing acid levels, it helps prevent irritation and damage to the stomach and oesophagus.
What is omeprazole used to treat?
Omeprazole is commonly used for:
- Acid reflux and heartburn
- Stomach and duodenal ulcers
- Indigestion caused by too much stomach acid
- Zollinger-Ellison syndrome (a rare condition that causes excess acid production)
- Preventing ulcers in people taking NSAIDs (like ibuprofen or naproxen)
Who can take omeprazole?
Most adults and children over 1 year old can take omeprazole. It’s often prescribed for short-term or long-term management of acid-related conditions.
Who might not be able to take omeprazole?
Omeprazole may not be suitable if you:
- Are allergic to omeprazole or similar PPIs (like lansoprazole or esomeprazole)
- Have severe liver disease
- Are taking certain medications (such as nelfinavir for HIV, which interacts with omeprazole)
Can I take omeprazole if I’m pregnant or breastfeeding?
Omeprazole is usually safe during pregnancy, but you should always check with your doctor first. It is also generally considered safe to take while breastfeeding.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s nearly time for your next dose, skip the missed one – don’t take two doses at once.
How effective is omeprazole?
Omeprazole is highly effective at reducing stomach acid. Most people feel relief within a few days, but it can take up to four weeks for full benefits.
What should I do if I take too much omeprazole?
Taking too much omeprazole may cause nausea, dizziness, confusion, or an irregular heartbeat. If you’ve taken more than your prescribed dose, seek medical advice.
What dose of omeprazole is usually taken?
The usual doses are:
- Acid reflux and heartburn: 10mg to 40mg once daily
- Stomach ulcers: 20mg to 40mg once daily
- Zollinger-Ellison syndrome: Higher doses as adjusted by your doctor
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What are the side effects of omeprazole?
Most people tolerate omeprazole well, but some common side effects include:
- Headache
- Nausea or vomiting
- Diarrhoea or constipation
- Stomach pain
- Dizziness or tiredness
Long-term use may increase the risk of bone fractures and vitamin B12 deficiency.
How should I take omeprazole?
Omeprazole is available as capsules, tablets, or a liquid. It should be swallowed whole with water and not crushed or chewed.
When should omeprazole be taken?
Omeprazole is best taken in the morning before breakfast. If you’re on a twice-daily dose, take the second dose before dinner.
What are the brand names for omeprazole?
Omeprazole is available under different brand names, including:
- Losec
- Mezzopram
Final thoughts
Omeprazole is a safe and effective treatment for acid-related conditions. If taken correctly, it can relieve symptoms and help heal the stomach lining. If you have concerns about long-term use or side effects, speak to a doctor or pharmacist.
