If you are comparing omeprazole capsules and tablets, the main difference is the formulation and how you take them. Both can contain omeprazole, but they are not necessarily made in exactly the same way. Some capsules contain gastro-resistant granules, while some tablets contain gastro-resistant pellets. The instructions for taking them can also vary between products.
For adults in the UK who need omeprazole, the most suitable form can depend on whether you can swallow capsules or tablets easily, the exact product you have been prescribed, and your personal preference. This guide explains the differences between omeprazole capsules, tablets, dispersible tablets and liquid options. It also covers questions such as omeprazole magnesium versus omeprazole and when to ask a pharmacist for advice.
Choosing a form that you can take correctly and consistently is important. However, the right formulation and dose depend on your individual treatment needs, so this information should be used as general guidance rather than a personal treatment plan.
Omeprazole Capsules vs Tablets: The Key Difference
Both capsules and tablets can contain omeprazole. Because omeprazole is sensitive to stomach acid, oral products are designed to protect the medicine until it reaches the small intestine. Depending on the product, this can be done using gastro-resistant granules or pellets.
- Omeprazole capsules are usually gastro-resistant capsules containing coated granules. They are generally swallowed whole.
- Some omeprazole tablets are gastro-resistant tablets containing coated pellets. Certain products can be dispersed in water, but you should check the specific product leaflet before doing this.
Omeprazole is a proton pump inhibitor (PPI) that reduces the amount of acid produced by the stomach.
So, when comparing a capsule with a tablet, the important difference is usually the formulation and how it needs to be taken. The exact instructions can vary between products.
Capsule vs Tablet at a Glance
| Form | What it is | Who it may suit |
|---|---|---|
| Gastro-resistant capsule | A capsule containing coated granules, usually swallowed whole | People who can swallow capsules |
| Gastro-resistant tablet | A tablet containing the active medicine, with some products containing gastro-resistant pellets | People who prefer tablets or have been prescribed this form |
| Dispersible gastro-resistant tablet | A tablet that can be dispersed in liquid for certain products | People who have difficulty swallowing solid tablets |
| Oral suspension or granules | Omeprazole supplied as a liquid or as granules that are prepared according to the product instructions | People who cannot take standard solid forms, including some people using feeding tubes |
Not every formulation is available for every strength or condition, so the product leaflet or a pharmacist can confirm what applies to your medicine.
Do Capsules and Tablets Work Differently on Stomach Acid?
Both forms can be used to deliver omeprazole and reduce stomach acid. However, it is better not to assume that every capsule and tablet is interchangeable simply because they contain the same active ingredient.
Different products can contain different forms of omeprazole and may have different instructions for swallowing, dispersing or opening the product. For example, UK Losec MUPS tablets contain omeprazole magnesium, while some gastro-resistant capsules contain omeprazole itself.
For most people, the practical question is which licensed formulation is suitable for their condition and easiest to take correctly. If you are changing from one product to another, a pharmacist can check the strength, formulation and instructions for you.
Liquid Proton Pump Inhibitor (PPI) Options for Adults
If you cannot swallow standard capsules or tablets, there are other ways to take omeprazole or another PPI.
Depending on the medicine and strength, options can include:
- Dispersible gastro-resistant tablets that are mixed with water before being taken.
- Oral suspension products containing omeprazole.
- Granule formulations that are prepared according to the product instructions.
- Certain capsules that can be opened and the contents taken with water or soft food, but only when the product leaflet specifically allows this.
The exact instructions are important because the protective coating on the granules or pellets needs to remain intact. Do not assume that a capsule can be opened or a tablet can be crushed just because another omeprazole product can be handled that way.
There are licensed oral suspension and dispersible omeprazole products available in the UK, although availability varies by product and strength.
If you use a feeding tube or have significant difficulty swallowing, ask your pharmacist or prescriber which formulation is appropriate.
Omeprazole Magnesium vs Omeprazole
You may see a product labelled omeprazole magnesium and wonder whether it is a different medicine. Omeprazole magnesium is a salt form of omeprazole used in some formulations.
For example, UK Losec MUPS tablets contain omeprazole magnesium in an amount equivalent to the stated dose of omeprazole. A 20mg product is labelled as providing 20mg of omeprazole, even though the active ingredient is present as the magnesium salt.
This does not mean you should switch between products without checking the instructions. If you are changing from omeprazole to omeprazole magnesium, a pharmacist can confirm that the strength and formulation are suitable.
What About Prilosec Capsules vs Tablets?
Prilosec is a brand name for omeprazole used in the United States. In the UK, omeprazole is available under brand names such as Losec as well as under generic names.
If you have seen Prilosec mentioned online, check the active ingredient and strength rather than assuming that the capsule or tablet instructions are the same as a UK product.
For a UK medicine, always follow the instructions supplied with that specific product.
Which Form May Suit You Best?
There is no single omeprazole formulation that is right for everyone.
If you can swallow capsules comfortably, a standard gastro-resistant capsule may be straightforward to use. If you find capsules difficult to swallow, a suitable dispersible tablet or oral liquid may be easier.
The choice can also depend on the strength you need, the condition being treated and which formulations are available. A pharmacist or prescriber can help you choose a suitable option if you have problems with your current form.
Omeprazole is used to treat conditions including heartburn, GORD, stomach ulcers and H. pylori infection when used with antibiotics.
How to Take Each Form Correctly
The exact instructions depend on the product, but a few general points are important:
- Do not chew or crush gastro-resistant capsules, granules, pellets or tablets unless the product information specifically says that it is safe to do so. Damaging the protective coating can affect how the medicine is released.
- Swallow capsules whole unless the leaflet for your particular product says that the capsule can be opened.
- Some capsules can be opened and the granules mixed with water or a suitable soft food, but this is product specific. Check the leaflet first.
- Some MUPS or dispersible tablets can be dispersed in water. Follow the instructions for your particular product and do not chew the pellets.
- NHS guidance says omeprazole can generally be taken with or without food. If you take it once a day, try to take it at the same time each morning. If you take it twice a day, take it at the same time each morning and evening.
- If you are unsure how to take your particular formulation, ask a pharmacist rather than guessing.
When to Ask a Pharmacist
A pharmacist can be particularly helpful if you find your current capsules or tablets difficult to swallow, want to open a capsule, are unsure whether a tablet can be dispersed in water, or use a feeding tube.
It is also worth asking if you are switching between different omeprazole products or between omeprazole and omeprazole magnesium. The pharmacist can check the strength and instructions for the exact product you have.
Common side effects of omeprazole can include headache, diarrhoea, stomach pain, constipation, wind, nausea and vomiting. Not everyone gets side effects.
Omeprazole can also interact with some medicines, including clopidogrel, so tell your pharmacist or doctor about all medicines you take, including medicines bought without a prescription and herbal remedies.
Some side effects are uncommon or rare but need medical attention. Seek urgent help if you develop signs of a serious allergic reaction, such as swelling of the lips, tongue or throat, difficulty breathing or difficulty swallowing. Yellowing of the skin or eyes can also be a sign of a liver problem and should be assessed promptly.
Long term use of omeprazole can be associated with problems such as low magnesium levels and a slightly increased risk of certain fractures. The risk of some serious side effects can be higher with longer use, particularly for a year or more, so long term treatment should be reviewed when appropriate.
A rash, particularly on areas of skin exposed to sunlight, together with joint pain can rarely be linked to a type of lupus associated with PPIs. Speak to your doctor promptly if this happens.
Some low strength omeprazole products are available without a prescription in the UK. If you bought omeprazole from a pharmacy, NHS guidance says not to take it for longer than 2 weeks without speaking to a GP.
