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Home - Omeprazole 20mg

Omeprazole 20mg

Omeprazole belongs to a group of medicines called "proton pump inhibitors" (PPIs).

It works by reducing the amount of acid the stomach produces. Omeprazole is used to treat acid reflux and a number of other conditions caused by excess stomach acid.

Just a single capsule daily is enough to alleviate symptoms throughout the whole day making Omeprazole a convenient, and effective option for patients suffering with acid reflux.

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Price From: 12.95


Omeprazole belongs to a group of medicines called ‘proton pump inhibitors’ or "PPIs" for short. They work by reducing the amount of acid that your stomach produces.

Omeprazole 20mg Capsules are used to treat a multitude of conditions associated with stomach acid for example:

In adults:

  • ‘Gastro-oesophageal reflux disease’ (GORD). This is where acid from the stomach escapes into the gullet (the tube which connects your throat to your stomach) causing pain, inflammation and heartburn.

  • Ulcers in the upper part of the intestine (duodenal ulcer) or stomach (gastric ulcer).

  • Ulcers which are infected with bacteria called ‘Helicobacter pylori’. If you have this condition, your doctor may also prescribe antibiotics to treat the infection and allow the ulcer to heal.

  • Ulcers caused by medicines called NSAIDs (Non-Steroidal Anti-Inflammatory Drugs). Omeprazole 20 mg Capsules can also be used to stop ulcers from forming if you are taking NSAIDs.

  • Too much acid in the stomach caused by a growth in the pancreas (Zollinger-Ellison syndrome).

  • Omeprazole is a fast acting, convenient and effective treatment for acid reflux. A single capsule daily can alleviate symptoms throughout the whole day.


    Recommended dose for Acid Reflux:- ONE CAPSULE to be taken ONCE DAILY preferably 1 hour before food.

    Taking this medicine

  • It is recommended that you take omeprazole in the morning.
  • If you take more Omeprazole than you should

    If you take more Omeprazole than prescribed by your doctor, talk to your doctor or pharmacist straight away.


    Like all medicines, this medicine can cause side effects, although not everybody gets them.

    Common side effects (may affect up to 1 in 10 people)

  • Headache.
  • Effects on your stomach or gut: diarrhoea, stomach pain, constipation, wind (flatulence).
  • Feeling sick (nausea) or being sick (vomiting).
  • Uncommon side effects (may affect up to 1 in 100 people)

  • Swelling of the feet and ankles.
  • Disturbed sleep (insomnia).
  • Dizziness, tingling feelings such as “pins and needles”, feeling sleepy.
  • Spinning feeling (vertigo).
  • Changes in blood tests that check how the liver is working.
  • Skin rash, lumpy rash (hives) and itchy skin.
  • Generally feeling unwell and lacking energy.
  • For a full list of side effects CLICK HERE

    If you notice any of the following rare but serious side effects, stop taking Losec and contact a doctor immediately:

  • Sudden wheezing, swelling of your lips, tongue and throat or body, rash, fainting or difficulties in swallowing (severe allergic reaction).
  • Reddening of the skin with blisters or peeling. There may also be severe blisters and bleeding in the lips, eyes, mouth, nose and genitals. This could be ‘Stevens-Johnson syndrome’ or ‘toxic epidermal necrolysis’.
  • Yellow skin, dark urine and tiredness which can be symptoms of liver problems.
  • Losec may in very rare cases affect the white blood cells leading to immune deficiency. If you have an infection with symptoms such as fever with a severely reduced general condition or fever with symptoms of a local infection such as pain in the neck, throat or mouth or difficulties in urinating, you must consult your doctor as soon as possible so that a lack of white blood cells (agranulocytosis) can be ruled out by a blood test. It is important for you to give information about your medicine at this time.

    Reporting of side effects

    If you get any side effects, talk to your doctor or pharmacist.


    Medication Quantity Price
    Omeprazole 20mg 14 Capsules
    £12.95 12.95
    Omeprazole 20mg 28 Capsules (28 days)
    £19.50 19.5


    Always read the patient information leaflet before commencing treatment.

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