Lansoprazole
Lansoprazole is a proton pump inhibitor (PPI) that reduces stomach acid. It may be prescribed for acid reflux (GORD), stomach or duodenal ulcers, or sometimes with antibiotics for H. pylori, depending on your diagnosis.
This medicine is part of the Stomach acid & reflux category.
Generic name: lansoprazole
Quick answers
Short replies to searches people often run before speaking to a clinician. For the overview of what the medicine is used for, see the short summary under the page title above.
What is it for?
Lansoprazole is a proton pump inhibitor (PPI) that reduces stomach acid.
How long does it take to work?
Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review.
What are common side effects?
Common effects can include headache, diarrhoea, constipation, tummy pain, or wind.
Can you take paracetamol or ibuprofen with it?
PPIs can affect absorption or levels of some drugs (for example certain antifungals, antiretrovirals, or iron).
Compare this medicine
Side-by-side guides and related reads — use these links for fuller context; they do not mean you should switch treatment yourself.
- Omeprazole vs Lansoprazole — side-by-side guide
More about what Lansoprazole is used for
Lansoprazole is a proton pump inhibitor (PPI) that reduces stomach acid. It may be prescribed for acid reflux (GORD), stomach or duodenal ulcers, or sometimes with antibiotics for H. pylori, depending on your diagnosis.
Your GP or pharmacist may advise how long to take it and when to review the need for ongoing treatment.
How does Lansoprazole work, and how long does it take to work?
PPIs block the proton pump in stomach cells that releases acid. Symptom relief may begin within a few days; ulcer healing takes longer.
It treats acid-related symptoms; persistent symptoms still need medical assessment.
How and when should you take Lansoprazole?
Lansoprazole is often taken once daily before food, but follow your label — some people take two doses for certain conditions.
Capsules should usually be swallowed whole; some brands have dispersible forms if you cannot swallow capsules — ask your pharmacist.
What are the common side effects of Lansoprazole?
Common effects can include headache, diarrhoea, constipation, tummy pain, or wind. Most are mild.
Speak to your pharmacist if symptoms are troublesome.
Serious side effects of Lansoprazole — when to get urgent help
Seek urgent advice for severe allergic reactions, persistent severe diarrhoea, unexplained weight loss, or vomiting blood.
Long-term PPI use is reviewed periodically by prescribers because of possible long-term effects in some people.
What if you miss a dose of Lansoprazole?
If you miss a dose, take it when you remember unless it is almost time for the next. Do not double up.
If you take lansoprazole intermittently, your pharmacist can explain a suitable pattern.
Who should not take Lansoprazole?
Lansoprazole may not suit everyone; your prescriber considers allergies, liver problems, and interactions.
Some alarm symptoms need investigation rather than long-term self-treatment with acid medicines.
Can you take paracetamol or ibuprofen with Lansoprazole? — other interactions
Lansoprazole in pregnancy and breastfeeding
Discuss use in pregnancy or breastfeeding with your GP or midwife; they can weigh benefits and alternatives.
Blood tests and monitoring on Lansoprazole
Routine blood tests are not always needed for short courses. Long-term use may prompt review of bone health, B12, or magnesium in selected patients.
What might your GP prescribe instead of Lansoprazole?
Your GP may suggest Omeprazole or another PPI, H2 blockers, antacids, or lifestyle measures depending on your symptoms and response.
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Reviewed by UK registered pharmacists for accuracy and clarity. Content is informational only.
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Frequently asked questions about Lansoprazole
People also ask — common Google searches
- What is Lansoprazole used for?
- Lansoprazole is a proton pump inhibitor (PPI) that reduces stomach acid. It may be prescribed for acid reflux (GORD), stomach or duodenal ulcers, or sometimes with antibiotics for H. pylori, depending on your diagnosis.
- How long does Lansoprazole take to work?
- Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review. Always follow your prescriber’s follow-up plan.
- Can you take Lansoprazole with paracetamol or ibuprofen?
- PPIs can affect absorption or levels of some drugs (for example certain antifungals, antiretrovirals, or iron).
- What are the side effects of Lansoprazole?
- Common effects can include headache, diarrhoea, constipation, tummy pain, or wind. Most are mild. See the sections below for more detail, including serious side effects and when to seek urgent help.
- Lansoprazole vs omeprazole — what is the difference?
- Both are PPIs that reduce stomach acid. They are similar in effect for many people; your prescriber or pharmacist chooses formulation, dose, and cost.
- How long can I take lansoprazole?
- Duration depends on the condition. Many people use a defined course; long-term use should be reviewed by your prescriber to ensure it remains necessary.
Need personalised advice?
Your local pharmacist or GP surgery can help with questions about your medicines, side effects, and alternatives that may be suitable for you.
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Often used with
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