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Important: Treatment is subject to clinical eligibility, clinician approval and product availability.

Omeprazole Tablets [28 tablets] - Rightangled

Vendor:Rightangled

Omeprazole Tablets [28 tablets]

£ 4.99

Heartburn

It works by reducing the amount of acid your stomach produces, helping to relieve discomfort and prevent symptoms from returning.

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Omeprazole Tablets [28 tablets]

20mg

£ 4.99

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01 Type of medicine

proton pump inhibitor (PPI). It

02 Generic

Yes

03 Active ingredient

Omeprazole

04 Effective within

Omeprazole typically begins reducing stomach acid within 1-2 hours after ingestion, with full therapeutic effects usually seen after 2-3 days of regular use.

05 Works by

It works by reducing the amount of acid your stomach produces, helping to relieve discomfort and prevent symptoms from returning.

06 Side effects

Headache, diarrhoea, stomach pain, constipation vomiting and nausea

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MEDICATION DETAILS

Description

Omeprazole Tablets (28 tablets)

Omeprazole Tablets are used for acid related conditions including heartburn, acid reflux, indigestion and stomach ulcers. Omeprazole is a proton pump inhibitor, or PPI, which reduces how much acid the stomach produces. This is the tablet form, which some people find easier to take than a capsule. It is a medicine that requires a clinician to assess whether it is suitable for you.

How it works

The lining of the stomach contains pumps that generate acid. A PPI shuts those pumps down at source. That is why it differs from an antacid, which neutralises acid already present and wears off quickly, and from an alginate, which forms a raft to stop acid rising. The trade off is that a PPI builds over several days rather than giving instant relief, so it is taken as a course rather than when symptoms strike.

How to use it

Swallow the tablet whole with water, usually in the morning before food, exactly as directed. Do not chew or crush it, as it is gastro resistant and needs to pass the stomach intact. Finish the course your clinician has set even once symptoms settle. Alongside it, smaller evening meals, less alcohol and caffeine, and not lying down soon after eating all reduce reflux.

Who it is for

It is for people where a clinician has confirmed a PPI is appropriate. Tell your clinician about liver problems, low magnesium, osteoporosis risk and all other medicines, since omeprazole interacts with several, including clopidogrel, methotrexate and some HIV medicines.

Safety and when to get advice

Headache, diarrhoea, constipation, wind and nausea are among the reported effects. Long term use is reviewed because of effects on magnesium, vitamin B12 and bone health. See a doctor promptly for difficulty or pain on swallowing, food sticking, unexplained weight loss, persistent vomiting, vomit resembling coffee grounds or black tarry stools. Seek emergency help for chest pain with breathlessness or sweating. Our UK pharmacy team can answer questions about this product before you buy.

Common questions

Tablets or capsules?
Both deliver the same medicine in a gastro resistant form. Choice usually comes down to what you find easier to swallow.

How soon will it help?
The effect builds over a few days rather than on the first dose.

Can I stop once I feel better?
Finish the course your clinician set, especially if you are being treated for an ulcer.

Always read the patient information leaflet supplied with the pack before use.

Directions

For best results, take one capsule daily, preferably in the morning. Swallow it whole with a glass of water -do not chew or crush the capsule. You can take Omeprazole with or without food. Treatment length varies depending on your condition. Most people find relief within a few days, but it may take up to four weeks for the full effect.

Ingredients

Each capsule contains 20mg of the active ingredient omeprazole, along with other ingredients such as sugar spheres, sodium laurilsulfate, mannitol, and gelatin. The capsule shell contains permitted colorants, including titanium dioxide and quinoline yellow.

Side Effects

Like all medications, Omeprazole may cause side effects, although not everyone experiences them. The most common side effects include headaches, nausea, stomach pain, diarrhoea, and constipation. These are usually mild and go away on their own. If you experience severe symptoms, such as an allergic reaction or persistent stomach pain, seek medical advice.

Warnings

Before taking Omeprazole, let your doctor know if you have liver problems, are due for an endoscopy, or are taking other medications that may interact with it, such as warfarin or antifungals. Long-term use may slightly increase the risk of bone fractures, so consult your doctor if you have osteoporosis. Pregnant or breastfeeding women should seek medical advice before use.

Medically reviewed and published

This page was medically reviewed by Dr Sohaib Imtiaz, Clinical Lead on Apr 11, 2026, 4:00 pm

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Based on your current dose, you could switch to:

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FAQs

Please read our FAQs page to find out more.

Can I take omeprazole if I am also on clopidogrel?

Omeprazole can reduce how well clopidogrel (a blood-thinning medicine) works, because both are processed by the same liver enzyme. This combination is best avoided, and a different acid-reducing medicine is usually preferred. Tell our pharmacy team at info@rightangled.com about all your medicines before starting.

Can I open the capsule if I find it hard to swallow?

The capsule can usually be opened and the granules swallowed in a little water or soft, slightly acidic food such as yoghurt. The granules should be swallowed whole and not chewed, as they are designed to release in the gut rather than the stomach. Check your product leaflet for the exact method.

Could omeprazole affect an upcoming endoscopy or stomach test?

Yes. Because it lowers stomach acid, omeprazole can mask symptoms and affect the results of an endoscopy or certain stomach tests. If you have one planned, let the clinician arranging it know you are taking omeprazole.

Why is it best taken before food?

Omeprazole works on the acid-producing pumps in the stomach that become active when you eat. Taking it shortly before a meal, usually in the morning, lets it act on those pumps when they are most active, which gives the best effect.

We are here to help 👋

For assistance, please contact our customer service at info@rightangled.com. We are available Monday to Friday from 8 am to 5 pm. For urgent issues, please do not use this email. Instead, call 111, or dial 999 in case of an emergency.