Omeprazole

£11.95 GBP

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Available Strength 10 mg 20 mg

Available Quantity 28 56 84

Omeprazole is a proton pump inhibitor that reduces the amount of acid your stomach makes, easing heartburn and acid reflux.

Once-daily capsule
Relieves heartburn and acid reflux
Reviewed by UK-registered clinicians
Discreet, tracked delivery

What is Omeprazole?

Omeprazole is a very commonly prescribed drug in the UK used to lower stomach acid. It is effective in treating acid reflux, heartburn, indigestion and most conditions related to excess stomach acid. Omeprazole medication reduces the production of acid in the stomach relieving the symptoms such as burping, a burning sensation in the chest, feeling full, heavy or bloated and pain in the stomach. Omeprazole has a high success rate and calms down the symptoms for up to 72 hours. Omeprazole is a proton pump inhibitor (PPI) that reduces the production of stomach acid, helping to treat conditions like acid reflux, heartburn, and ulcers. It is also used to promote healing of the stomach lining and prevent further acid damage.

How Does Omeprazole Work?

During the digestion process, the stomach produces acid to help break down food substances. The oesophagus is protected from these acids by the oesophageal sphincter muscles. The muscles allow a one way system for food to get to the intestines while acids remain down. When the muscles weaken, acid passes down, resulting in acid reflux and causing heartburn. Frequent acid may be a result of gastro-oesophageal reflux disease (GORD). Omeprazole is a prescription medicine for GORD and other similar stomach conditions. It works by suppressing the activity of proton pumps, the proteins which produce acids in the stomach. This decreases the amount of acid in the stomach, relieving the symptoms of heartburn.

How to use Omeprazole

Follow the instructions of your healthcare provider for the course of medication:

Swallow 1 (20mg) capsule once a day with water.
Take one capsule ideally 30 minutes before a meal.
Do not crush or chew.
Speak to your prescriber if you do not notice an improvement in symptoms within a few days.

Possible side effects

Few people experience side effects with Omeprazole. They may include

Passing wind
Stomach pain
Constipation
Diarrhoea
Headache
Nausea

Seek medical advice if serious side effects occur, as these can result in liver or kidney issues.

Warnings and precautions

Inform your doctor if you are using other medication, or you notice any of the symptoms below:

Develop indigestion or stomach pain.
Sudden weight loss.
Have trouble swallowing.
Have liver problems.
Notice blood in vomit or stools.

Severe allergic reactions can occur, such as liver problems or kidney issues.

What are the ingredients in Omeprazole?

The active ingredient contained in Omeprazole capsules is Omeprazole 10/20mg.

Omeprazole capsules also contain the following inactive ingredients: disodium phosphate, sugar spheres, sodium lauryl sulphate, mannitol, hypromellose, polyethene glycol 6000, talc, polysorbate 80, titanium dioxide, eudragit L30-D55 (poly), (methacrylic acid, ethyl acrylate), gelatin, quinolone yellow (E104), titanium dioxide (E171).

Frequently asked questions

Everything you need to know about Omeprazole before you start.

1. How long does omeprazole take to work?

Relief may begin within a few hours, but it can take several days for full effectiveness.

2. Can I take omeprazole with food?

Yes, it can be taken with or without food, but it's recommended to take it before meals for the best effect.

3. Is omeprazole safe for long-term use?

Long-term use should be monitored by a healthcare provider, as it may increase the risk of certain side effects, such as vitamin deficiencies.

4. Can I take omeprazole with other medications?

Some medications may interact with omeprazole. Inform your doctor of any other drugs you are taking to avoid interactions.

5. What should I do if I miss a dose?

Take it as soon as you remember, unless it's close to the next dose. Do not double up.

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How it works

Throughout your treatment, the SwiftDoctor clinical team is available to support you, answer questions, and review your progress.

Step 1

Complete your health questionnaire online in less than five minutes

Takes less than five minutes. Answer a few straightforward questions about your health history, lifestyle, and goals — all from the comfort of your home, with no GP appointment needed. Add your desired medication to your basket and make payment.
Step 2

A UK-registered clinician reviews your responses

A UK-registered clinician personally evaluates your submission to ensure Mounjaro is safe and appropriate for you. Your health is never treated as a formality.
Step 3

If eligible, your prescription is issued

If you meet the clinical criteria, your prescription is approved and prepared without delay. No waiting rooms. No repeat visits. Just a clear, straightforward process.
Step 4

Your medication is dispatched in discreet, temperature-controlled packaging directly to your address

Your medication is dispatched in plain, temperature-controlled packaging — protecting both its integrity and your privacy. Straight to your address, on your schedule.

Meet our clinical team

Dr S. Bano
Dr Bano is a co-founder of SwiftDoctor. She is an experienced General Practitioner with a special interest in obesity management, medical education, and digital health. She qualified as a doctor from the University of Nottingham in 2011 and has since built a diverse and impactful career in both clinical and educational settings.
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Nasir Ali
Mr Nasir Ali is a co-founder and the Superintendent Pharmacist at SwiftDoctor. He is a highly experienced Advanced Clinical Practitioner. With extensive experience in primary care, he has worked across GP surgeries and digital health clinics, bringing a deep understanding of both face-to-face and virtual models of care.
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Jane Eastwood
I am a Registered Nurse with 23 years’ experience – I have worked extensively in New Zealand and in the UK and I currently work as an Advanced Clinical Practitioner in the General Practice setting and I have special interests in menopause, diabetes, general practice and the older adult.
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