Omeprazole
From £12.99
For many common acid related conditions, omeprazole is prescribed at doses of up to 40mg a day. Depending on the condition and your treatment plan, this may be taken as 40mg once daily or 20mg twice daily. Omeprazole is a proton pump inhibitor (PPI) that reduces the amount of acid produced in the stomach. It is used to treat conditions such as acid reflux, GORD and stomach ulcers.
If you have been told you are approaching, or are already taking, a higher dose of omeprazole, it is natural to want to know what happens next. For adults in the UK seeking information about omeprazole treatment through EverydayMeds, this guide explains how omeprazole dosing can change from a starting dose to a higher daily dose, when doses may be increased, which conditions may need higher doses such as Zollinger Ellison syndrome, and what to know about liver or kidney considerations, long term use and getting omeprazole through our online pharmacy service.
Knowing how omeprazole doses are used can help you understand your treatment and recognise when ongoing symptoms may need a review rather than simply taking more medicine. The right dose depends on your condition, other medicines and your individual circumstances. Your prescriber should guide any dose changes.
What to Expect When You Start Omeprazole
Many adults start omeprazole at 10mg or 20mg once daily, depending on the condition being treated. For symptomatic GORD, 20mg once daily is a commonly recommended dose, although some people may respond to 10mg. Higher doses can be used when clinically appropriate.
Many people start to notice some improvement within a few days. However, the length of treatment depends on the condition. For example, treatment for GORD may last 4 to 8 weeks, while severe reflux oesophagitis may require an 8 week course.
Feeling better after a few days does not necessarily mean that any irritation or inflammation has fully settled. Take omeprazole for as long as your prescriber recommends, even if your symptoms improve sooner.
What Is the Maximum Dose of Omeprazole in 24 Hours?
For many common conditions, including GORD and some stomach or duodenal ulcers, omeprazole may be prescribed at up to 40mg a day. Depending on the condition, this may be taken as 40mg once daily or divided into two 20mg doses.
However, 40mg is not a universal maximum for every condition. Some people with Zollinger Ellison syndrome may need considerably higher doses under specialist care. UK product information describes individually adjusted doses of 20mg to 120mg a day for this condition. Doses above 80mg a day should be divided into two doses.
This means there is no single maximum dose that applies to everyone. The appropriate dose depends on why you are taking omeprazole and how your condition responds to treatment.
What to Expect If Your Dose Is Increased
If 20mg once daily does not control your symptoms or is not enough for the condition being treated, your prescriber may consider a higher dose. For some conditions, this may mean increasing the dose to 40mg daily. For example, 40mg once daily is recommended for severe reflux oesophagitis.
A dose increase does not necessarily mean that something has gone wrong. Your prescriber may decide that a different dose is more appropriate for your particular condition.
Before increasing the dose, your prescriber may review your symptoms, how regularly you are taking omeprazole and whether anything else could be contributing to your symptoms. If symptoms continue despite treatment, further investigation may sometimes be needed rather than simply increasing the dose.
How Many Omeprazole Can I Take? Understanding Your Limit
There is no single number of capsules or tablets that applies to everyone. It depends on the strength you have been prescribed and the dose your prescriber has chosen.
For example, someone prescribed 20mg twice daily would take two 20mg doses in a day. Someone prescribed 40mg once daily would take one 40mg dose. These are different ways of reaching the same total daily dose.
If you are unsure how many capsules or tablets you should take, check the label on your prescription or speak to your pharmacist or prescriber. Do not take extra capsules because your symptoms have not improved as much as you expected.
What to Expect at Higher Doses: Zollinger Ellison Syndrome
Zollinger Ellison syndrome is a rare condition in which tumours called gastrinomas cause the body to produce unusually large amounts of stomach acid. Because acid production can be much higher than usual, some people with this condition need doses of omeprazole that are well above those normally used for GORD or routine ulcer treatment.
UK product information recommends an initial dose of 60mg daily, but the dose is individually adjusted. Doses of 20mg to 120mg daily have been used in some patients. If the dose is above 80mg daily, it should be divided into two doses.
This type of treatment is different from increasing omeprazole because of occasional heartburn. It requires medical supervision and an individual treatment plan. A dose in this range should not be reached through self adjustment.
Omeprazole Dosing by Condition: GORD and Other Uses
| Condition | Typical dose or maximum used | What to expect |
|---|---|---|
| Heartburn and symptomatic gastro oesophageal reflux disease (GORD) | Usually 20mg daily, although 10mg may be enough for some people | The dose can be adjusted depending on symptoms and clinical assessment |
| GORD with severe reflux oesophagitis | 40mg daily | Treatment may continue for up to 8 weeks, followed by review |
| Stomach or duodenal ulcers | Usually 20mg daily; 40mg daily may be used for some poorly responsive ulcers | Treatment length depends on the type of ulcer and response |
| NSAID related ulcer prevention | 20mg daily in people who need protection and are at risk | Usually taken while the NSAID treatment continues |
| H. pylori eradication | 20mg twice daily as part of an appropriate combination treatment | Combined with antibiotics as part of an eradication course |
| Zollinger Ellison syndrome | 20mg to 120mg daily, individually adjusted | Specialist led treatment with the dose adjusted according to clinical need |
These figures are a general guide rather than a personal dosing plan. Your prescribed dose depends on your diagnosis, symptoms and individual clinical assessment.
What to Expect If You Have Liver or Kidney Problems
Liver function can affect how omeprazole is processed. In people with impaired liver function, a daily dose of 10mg to 20mg may be sufficient. Your prescriber can decide whether your dose needs to be adjusted based on your individual circumstances.
Kidney impairment does not usually require a dose adjustment for omeprazole. However, PPIs such as omeprazole have rarely been associated with tubulointerstitial nephritis, a type of kidney inflammation. If you develop symptoms such as reduced urine output, blood in your urine or unexplained swelling, contact a healthcare professional.
Make sure your prescriber knows about any liver or kidney problems before starting omeprazole or changing your dose.
What to Expect With Long Term Higher Dose Treatment
If you take omeprazole for a long time, particularly at a higher dose, your treatment may need to be reviewed from time to time. The aim is generally to use the lowest dose that controls your symptoms when ongoing treatment is needed.
Long term PPI treatment has been associated with problems such as low magnesium levels, vitamin B12 deficiency, fractures and certain gastrointestinal infections. These effects do not happen to everyone, but they are among the reasons long term treatment may need to be reviewed.
If you have been taking a higher dose for a long time, do not change or stop your treatment without speaking to your prescriber. They can assess whether you still need the same dose or whether a lower dose may be appropriate.
What to Expect If You Take More Than Your Prescribed Dose
If you accidentally take more omeprazole than prescribed, do not assume that you need to wait for symptoms before asking for advice. NHS guidance recommends getting medical advice if you have taken more than the amount stated on the packet, leaflet or prescription.
An extra dose is unlikely to cause problems in many cases, but taking too much can sometimes be dangerous. If you are concerned, contact NHS 111, your GP or a pharmacist.
If you are told to go to A&E, do not drive yourself. Ask someone to take you or call 999 for an ambulance. Take the omeprazole packet or leaflet with you if possible.
If you have missed a dose, take it when you remember unless it is nearly time for your next dose. In that case, skip the missed dose and continue as usual. Do not take two doses together to make up for a missed dose.
Available Treatment Options
EverydayMeds stocks omeprazole 20mg capsules and Losec MUPS 20mg tablets, alongside a range of alternative PPI options if omeprazole is not suitable.
Other PPIs include lansoprazole, pantoprazole, esomeprazole and rabeprazole. Famotidine is an H2 receptor antagonist that works differently from a PPI and may be considered in some situations.
Some types of omeprazole can be bought from pharmacies without a prescription for short term treatment. NHS guidance advises not taking omeprazole bought without a prescription for longer than 2 weeks without speaking to a GP.
If you take other medicines, tell your pharmacist or prescriber before starting or changing omeprazole, as some medicines can interact with it.
How to Get Omeprazole Through EverydayMeds
Getting omeprazole through EverydayMeds starts with a short online questionnaire about your symptoms and medical history. A UK registered prescriber reviews the information and decides whether omeprazole is suitable for you and, if appropriate, which dose may be suitable.
If your treatment needs to be reviewed later, your symptoms or circumstances can be assessed again. Your prescribed dose should always follow the advice given by the prescriber.
