Description
Lansoprazole is a proton pump inhibitor (PPI) that reduces the amount of acid your stomach makes. It is commonly used for frequent heartburn, acid reflux, and gastro-oesophageal reflux disease (GERD/GORD), and may also be used for ulcer-related conditions when prescribed. Lansoprazole capsules are gastro-resistant to help the medicine work properly in your digestive system.
At a glance
| Active ingredient | Lansoprazole |
| Strength options | 15mg and 30mg capsules (gastro-resistant) |
| Medicine class | Proton pump inhibitor (PPI) |
| How often | Usually once daily (some people are prescribed twice daily) |
| Best time to take | At least 30 minutes before food |
| When you may feel better | Often within 2-3 days; up to 4 weeks for full effect |
| Suitable for | Heartburn, reflux, GERD; ulcer-related conditions where prescribed |
Choosing the right strength (15mg vs 30mg)
The best dose depends on your symptoms, diagnosis, and response. A clinician will confirm what is appropriate.
- 15mg: commonly used for milder reflux symptoms, maintenance, or prevention plans where clinically appropriate.
- 30mg: commonly used for more persistent symptoms, confirmed GERD, or when stronger acid suppression is needed.
- If symptoms are not controlled, your prescriber may adjust the dose or review the diagnosis and treatment plan.
What Lansoprazole treats
- Frequent heartburn and indigestion linked to excess stomach acid.
- Acid reflux and GERD/GORD (including inflammation of the food pipe when diagnosed).
- Stomach and duodenal ulcers, and ulcer prevention in higher-risk patients when prescribed.
- Rare acid overproduction conditions such as Zollinger-Ellison syndrome (specialist dosing).
How Lansoprazole works
Lansoprazole blocks proton pumps (enzymes) in the stomach lining that produce acid. By lowering acid levels, it can reduce burning and regurgitation symptoms and allow irritated tissue to heal.
How to take Lansoprazole capsules (best practice)
- Take lansoprazole exactly as prescribed. Many people take it once daily, first thing in the morning.
- Take it at least 30 minutes before a meal or snack for best effect.
- Swallow capsules whole with water or juice. Do not crush or chew the capsule or granules.
- If you take it twice daily, take one dose in the morning and one in the evening (as prescribed).
- If you need an antacid, take it at least 2 hours before or after lansoprazole so it does not reduce absorption.
If you have difficulty swallowing, some guidance allows opening the capsule and taking the granules with a small amount of water, juice, or soft food. Follow the advice in your leaflet or from your pharmacist.
When will Lansoprazole start working?
Many people start to feel better within 2-3 days. It may take up to 4 weeks to work fully, so you may still have some symptoms during this time. For rapid, occasional relief, alginate or antacid products may be used alongside, with timing advice.
Important: check for ‘alarm’ symptoms
If you are using lansoprazole without a prescription, seek medical advice before taking it if you have:
- Unexplained weight loss.
- Trouble swallowing or persistent pain when swallowing.
- Vomiting repeatedly, vomiting blood, or black/tarry stools.
- Severe or persistent stomach/chest pain.
- Severe diarrhoea that does not go away.
These symptoms may need assessment before acid-suppressing treatment because PPIs can mask underlying problems.
Medicine interactions (tell your prescriber)
List all medicines and supplements you take during your online consultation.
- Clopidogrel: omeprazole and esomeprazole are usually avoided with clopidogrel; other PPIs (including lansoprazole) are generally considered safer options.
- Warfarin and other blood thinners: may need monitoring in some patients.
- Some antifungals and antivirals: absorption can be affected by changes in stomach acidity.
Possible side effects
Common side effects may include:
- Headache.
- Stomach pain, nausea, diarrhoea or constipation.
- Wind (flatulence) or dry mouth.
- Dizziness or sleepiness in some people.
If you take lansoprazole for more than 3 months, low magnesium can occur in some people, and longer-term use may carry additional risks. Use the lowest effective dose for the shortest time needed and attend reviews if you are on long-term therapy.
Who should not take Lansoprazole (or needs advice first)
- Anyone with a known allergy to lansoprazole or capsule ingredients.
- People with liver problems may need a different dose or closer monitoring.
- Pregnancy or breastfeeding: ask a clinician before use.
- If you are due to have an endoscopy, you may need to stop lansoprazole before the procedure (ask your clinician).
Buy Lansoprazole capsules online in the UK
If you need ongoing reflux/GERD control, lansoprazole capsules can be supplied following a brief clinical assessment to confirm suitability, dose (15mg or 30mg), and treatment duration. This also helps check for interactions and alarm symptoms.
How to order from MedCare
- Complete the online consultation (clinical questionnaire).
- A clinician reviews your answers and confirms the right strength and dosing schedule.
- If approved, your order is dispensed and prepared for delivery.
- Receive your lansoprazole capsules with discreet UK delivery and support if you have questions.
Why choose MedCare Health Clinic and Pharmacy?
- Consultation-first supply to match PPI strength to symptoms and risks.
- Straightforward reordering for longer treatment plans (when clinically appropriate).
- Support for dose timing (before food) and antacid spacing, plus side-effect guidance.
FAQs
How should I take lansoprazole capsules?
Most people take it once daily in the morning, at least 30 minutes before food. Swallow capsules whole with water or juice and do not crush the capsule or granules.
Can I take lansoprazole with antacids (e.g., Gaviscon)?
Yes, but separate antacids from lansoprazole by at least 2 hours because antacids can reduce absorption.
When will I feel better?
You should start to feel better within 2-3 days. It may take up to 4 weeks to work fully.
Is 15mg or 30mg better for reflux?
It depends on your symptoms and diagnosis. A clinician will recommend the most appropriate strength and course length.
Is lansoprazole safe long term?
Long-term use may be appropriate for some people but should be reviewed. Taking it for more than 3 months can lower magnesium in some patients, and longer use can increase the risk of certain side effects.

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