Omeprazole
From £12.99
If omeprazole is not right for you, whether it is not controlling your acid reflux symptoms well enough, causing side effects, or you are simply weighing up your options before starting treatment.
For people with reflux symptoms, the main medicines discussed are PPIs, H2 receptor antagonists and antacids or alginates, although the most appropriate option depends on the diagnosis, severity and treatment response.
For adults in the UK looking for effective treatment options for gastro oesophageal reflux disease, this guide gives you the overview: how those three categories differ, when one may be a better fit than another, which options are prescription-only or available over the counter, how long treatment is usually used for, and what to discuss with a prescriber before switching.
That matters because omeprazole does not suit everyone, and understanding the alternatives makes it easier to find symptom control that is effective, safe, and practical rather than persisting with a medicine that is causing problems or not working well enough.
For the full detail behind each comparison, this page links out to our dedicated guides rather than repeating the same ground three times over.
Key things to know
- The main medicine categories used for GORD include PPIs, H2 blockers and antacids or alginates.
- Within the PPI class, omeprazole, lansoprazole, pantoprazole, esomeprazole and rabeprazole are broadly comparable in effectiveness at equivalent doses, although individual response can vary.
- NICE recommends a full-dose PPI for GORD, with an H2 receptor antagonist considered when response to a PPI is inadequate.
- Antacids and alginates such as Gaviscon can provide relatively quick, short-term relief for occasional symptoms.
- Switching between PPIs, or considering an H2 blocker, may be appropriate if your current treatment is not providing adequate symptom control, and worth discussing with your prescriber.
The Three Real Categories of GORD Medication: Including Proton Pump Inhibitors
It helps to think of GORD medication in three genuinely different categories, rather than a long list of similar-sounding names.
PPIs provide more sustained acid suppression and are generally more effective than H2 blockers for ongoing GORD.
H2 receptor antagonists block one of the signals that triggers acid production. They can act more quickly but generally provide less sustained acid suppression than PPIs.
Antacids neutralise stomach acid, while alginate-containing products such as Gaviscon form a protective barrier that can reduce reflux into the oesophagus.
Most people's treatment sits within one of these categories, sometimes combining two, rather than needing to compare every individual product name against every other one.
Alternative 1: A Different PPI
If omeprazole itself isn't suiting you, the most common next step is simply trying a different PPI, since lansoprazole, pantoprazole, esomeprazole and rabeprazole all work through the same mechanism and are broadly interchangeable in effectiveness for most people.
Esomeprazole is the S-isomer of omeprazole and has a different pharmacokinetic profile. Some studies show greater acid suppression with esomeprazole at certain doses, which may be relevant in some people with persistent symptoms or erosive oesophagitis, but it is not automatically a better choice for everyone.
For a full dose-by-dose comparison across all five PPIs available, including which strengths are considered standard versus low/maintenance doses under NICE guidance, see our complete PPI dosage comparison guide. For the specific case of switching to esomeprazole, our omeprazole vs esomeprazole guide covers that comparison in depth.
Alternative 2: An H2 Blocker (Famotidine)
Famotidine, an H2 receptor antagonist, works differently from PPIs, blocking histamine receptors rather than the proton pump directly. It acts faster, often within 30–60 minutes, but for a shorter duration. It generally starts working within about an hour, but its acid-suppressing effect is shorter-lived than that of a PPI. NICE guidance positions H2 blockers as second-line, used if a PPI hasn't given adequate relief, or for step-down maintenance once symptoms are well controlled, rather than as an equal first choice.
Famotidine may have a role when a PPI has not provided adequate relief or is not suitable. Because it acts relatively quickly, a prescriber may also consider it in particular situations where shorter-acting acid suppression is appropriate.
Alternative 3: Antacids for Breakthrough Symptoms
Antacids neutralise stomach acid and can provide quick relief, while alginate-containing products such as Gaviscon form a protective barrier that helps reduce reflux into the oesophagus. Their effects are relatively short-lived and are mainly intended for short-term symptom relief. Some antacids can provide fast relief for occasional heartburn symptoms. Sucralfate works differently by forming a protective barrier over damaged tissue.
They are often taken after meals and at bedtime, unlike PPIs, which are usually taken once daily according to the product instructions, and are commonly used alongside a PPI or H2 blocker for occasional breakthrough symptoms rather than as a standalone treatment for ongoing GORD over long periods.
Which Alternative Fits Your Situation?
| If this describes you... | This is worth discussing with your prescriber |
|---|---|
| Omeprazole works but causes side effects | A different PPI (lansoprazole, pantoprazole, rabeprazole) |
| Omeprazole's effect feels inconsistent | Esomeprazole, given its more predictable metabolism |
| Occasional acid reflux symptoms rather than daily symptoms | An antacid or alginate for short-term relief. An H2 blocker may be considered in specific circumstances. |
| You need fast relief right now | An antacid like Gaviscon for occasional use; frequent heartburn should be reviewed with a healthcare professional |
| Your PPI has controlled symptoms and you want to step down | A lower-dose PPI or a switch to an H2 blocker |
Prescription-Strength vs Over-the-Counter Options
Some lower-strength omeprazole products are available from pharmacies for short-term heartburn relief. If symptoms are severe, persistent or return after short-term treatment, a healthcare professional may recommend a different dose or longer-term treatment. Do not stop or replace any prescribed medicine without checking with a healthcare provider.
Treatment Duration and Monitoring
Most GORD medication courses run for around 4 to 8 weeks, after which your prescriber will typically review whether symptoms have settled.
Long-term treatment is sometimes needed, and NICE recommends regular review with consideration of stepping down to the lowest effective dose where appropriate, rather than continuing indefinitely without check-ins, especially when taking omeprazole or other PPIs over time because uncommon but potentially important adverse effects may warrant reassessment.
Some PPIs can interact with other medicines, including clopidogrel, so your prescriber or pharmacist should review your other medicines when choosing a PPI.
Seek medical advice if you develop a suspected serious reaction or new symptoms while taking a PPI.
Available Treatments
| Treatment | Listed Price from |
|---|---|
| Lansoprazole 15mg Capsules | £5.99 |
| Pantoprazole | £5.99 |
| Famotidine Tablets | £8.49 |
| Lansoprazole 15mg Orodispersible Tablets | £8.49 |
| Esomeprazole | £16.99 |
| Omeprazole 20mg | £12.99 |
| Rabeprazole | £19.99 |
| Losec MUPS 20mg Tablets | £29.99 |
Prices update live and may change. Prices shown are those listed by EverydayMeds at the time of publication and may change. Check the individual product page for the latest price and what is included.
Medical Disclaimer
This guide provides general information about medicines used for GORD and acid reflux and is not a substitute for personalised medical advice, diagnosis or treatment. The most appropriate medicine, dose and duration depend on your symptoms, medical history, other medicines and response to treatment. Do not start, stop, switch or change the dose of prescribed reflux medicine without speaking to a doctor, pharmacist or other qualified healthcare professional. If symptoms persist, worsen or return frequently despite treatment, seek medical advice. You should also seek medical advice if you have difficulty swallowing, persistent vomiting, unexplained weight loss or other concerning symptoms.
