Omeprazole Capsules (10mg & 20mg)


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  • Used for treating heartburn, acid reflux, and stomach ulcers.
  • Usually taken once a day, it can be with or without food. Swallow whole with water.
  • Available in the UK through a prescription from your GP or pharmacist.

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Omeprazole Tablets


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Omeprazole Tablets


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Omeprazole Tablets


Our pharmacy, clinic & prescribers are based in Greater Manchester.

Omeprazole Tablets Information

Omeprazole 10/20mg is a medication called a Proton Pump Inhibitor (PPI), available to buy in the UK with a prescription. It’s commonly used to treat issues such as acid reflux, heartburn and indigestion, working by reducing the amount of acid in your stomach.

Omeprazole is the generic version of Losec which contains the same active ingredient, Omeprazole.

Medication NameOmeprazole Capsules (10mg & 20mg)
Active IngredientOmeprazole
Medication formCapsule
Used to treatHeartburn, acid reflux and stomach ulcers
Available dosages10mg, 20mg, 40mg
Common side effects
Diarrhoea or stomach pain 
Nausea or vomiting 
Who is this medication suitable forMost adults
Do you need a prescription for it?Yes
How should it be used?Swallow the capsule whole with a glass of
Patient Information Leaflet

What do Omeprazole tablets do?

Omeprazole targets tiny pumps in your stomach’s lining, called ‘proton pumps’, which release the acid needed for digestion. Omeprazole blocks these pumps, reducing the amount of acid in your stomach, which helps heal and prevent conditions such as acid reflux, heartburn, stomach ulcers and indigestion.

How long does Omeprazole take to work?

Omeprazole typically starts working one to two hours after taking it, but it may take a few days to reduce symptoms for conditions such as stomach ulcers. You may notice improvement in acid reflux symptoms quickly after taking Omeprazole, but you should continue taking it as advised by your GP or pharmacist to achieve the best results.

Who can take Omeprazole?

Omeprazole is suitable for most adults. You should not take it if you:

  • Are allergic to any of its ingredients
  • Are allergic to other medicines containing other proton pump inhibitors
  • Taking a medication containing nelfinavir (used for HIV infection)

How to take Omeprazole Tablets

Omeprazole should be taken at the same time every day, ideally in the morning, and swallowed whole with a glass of water. You can take Omeprazole tablets with or without food.

You should not chew or crush them.

If you forget to take your dose, take it as soon as possible unless your next dose is due in 12 hours or less, in which case you should skip the missed dose. Do not take 2 doses to make up for the one you’ve missed.

If you’re unsure how to take Omeprazole, speak to your pharmacist or read the patient information leaflet.

How effective is Omeprazole?

Omeprazole is very effective for treating stomach acid problems in adults and children, quickly reducing symptoms. For most people, it works well, is safe, and is also suitable for long-term conditions where too much acid is made.

A clinical study on long-term Omeprazole treatment in resistant gastroesophageal reflux disease concluded that treatment using Omeprazole long-term is highly effective and safe for helping to control symptoms of reflux esophagitis.

Omeprazole Side Effects

Like any medication, when taking Omeprazole, you may experience some side effects. The side effects of taking Omeprazole include:

Common side effects

  • Headache
  • Nausea or vomiting
  • Diarrhoea or stomach pain

Uncommon side effects

  • Swelling of the feet and ankles
  • Disturbed sleep
  • Dizziness

Rare side effects

  • Taste changes
  • Feeling agitated, confused or depressed
  • Eyesight problems
  • Sudden wheeziness or shortness of breath
  • Hair loss

For more information on the side effects of Omeprazole, read the patient information leaflet.

If you encounter severe or unusual side effects from taking Omeprazole, seek immediate medical attention.

Omeprazole Ingredients

Active Ingredient: Omeprazole

Other Ingredients: lactose monohydrate, sodium starch glycolate, sodium stearyl fumarate, sodium stearate, hypromellose acetate succinate.

Omeprazole Tablets Warnings

  • Store the tablets at room temperature, away from moisture and heat.
  • Keep out of the SIGHT and REACH of children.
  • Do not use after the expiry date on the pack.

Omeprazole Tablets FAQs

Omeprazole capsules can be taken with an antacid such as Peptac liquid if needed to manage acid reflux symptoms.

You can buy Omeprazole tablets online from our Acid reflux clinic. At Click2Pharmacy, our online clinic and free consultations offer a simple way to receive your meds. Fill out a quick consultation form, and our pharmacists will check it. Once approved, your prescription will be delivered directly to your door.

If you’re pregnant, think you may be pregnant, planning on getting pregnant, or breastfeeding, please let one of our pharmacists know during your consultation. Although Omeprazole is excreted in breast milk, it is unlikely to affect your child when the advised dose is taken.

Omeprazole capsules are hard, opaque gelatine capsules. They are white in colour and marked with “OM 10” or “OM 20”.

It’s advised not to drink alcohol whilst taking omeprazole. Although alcohol doesn’t change how omeprazole functions, it causes your stomach to produce more acid, which could worsen symptoms

Customer Reviews

Based on 68 reviews
Ibrahim Ahsan
Ibrahim Ahsan
Very helpful staff, never had any issues with this pharmacy, 100% recommend
Julie Beardsley
Julie Beardsley
Very professional service. Just like having your very own pharmacist. Brilliant
Mohammed Khan
Mohammed Khan
Just had private bloods taken short wait time very thorough good price nice lady would recommend.
Sarah Smithies
Sarah Smithies
It is great to have somewhere local that does blood testing. The staff are lovely, helpful and experienced. They fit me in last minute. There is never a wait and the results back within a day or two.
After refusal of doctors appointment same old same old ring back etc. I was invited at 5.25 to see doctor I drove over immediately. Everything fully explained and checked over I was leaving by 6pm with penicillin for strep throat. Had I followed my doctors receptionist I would probably have suffered longer and increased the chances of a worse infection.I Great efficient service.
Lisa Lowther
Lisa Lowther
Fantastic service went for blood done very fast very friendly fantastic customer service

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