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Omeprazole 20mg Capsules

*The brand supplied may vary. Please contact us if you require a specific brand.

Omeprazole 20mg Capsules (28 capsules)

Order before 3pm for delivery from Fri. 18 Jun and Mon. 21 Jun.

Description for Omeprazole 20mg Capsules

Omeprazole is one of the most commonly prescribed medicines in the UK and is effective in reducing stomach acid. It helps to relieve the symptoms of acid reflux, heartburn, GORD and other issues involving excess stomach acid.

Buy Omeprazole 20mg capsules online at The Independent Pharmacy. Order now by completing our free online consultation and get delivery as quickly as the next working day.

Omeprazole Information

  • Age: 18 Years +

    Maximum per order: 3

  • Pregnancy: Not suitable

    Breastfeeding: Not suitable

Omeprazole capsules are a reliable treatment for stomach problems including heartburn, acid reflux, and indigestion. They ease these recurrent symptoms by suppressing the production of acid in the stomach for a period of up to 72 hours. These capsules are taken daily, and will take effect within one hour.

Stomach acid is necessary for the digestive process. They break down food before it reaches the intestines. Normally, the oesophagus is protected from these acids by a group of muscles called the oesophageal sphincter. These muscles are meant to form a one-way barrier: food can enter the stomach but acids and other substances remain down. However, sometimes, this sphincter weakens under excess pressure. As a result, stomach acid passes this barrier and enters the oesophagus. This is acid reflux. Heartburn is the name for the painful sensation of acid irritating, or burning, the tissues of the oesophagus. It has nothing to do with the heart – it gets its name because the pain is felt at the base of the chest.

Many will experience occasional heartburn. However, some people suffer from these symptoms very frequently – this may be due to gastro-oesophageal reflux disease (GORD). Omeprazole is a prescription medicine for GORD and other similar stomach conditions. It works by suppressing the activity of proton pumps, the proteins which produce acids in the stomach. This decreases the amount of acid in the stomach, relieving the symptoms of heartburn. This effect can last for a period of up to 72 hours; your acid levels will return to their previous level three to five days after you stop taking the medication.

GORD is fairly common – it is thought to affect 20% of people. Anyone can suffer from GORD, though it is most common in men over 40. Along with the pain of heartburn, acid reflux can leave a very unpleasant taste if acid reaches the mouth. These symptoms are likely to be much worse if you are lying down horizontally. Consider sleeping on an incline, and avoid lying down after eating. Often people experiencing heartburn may also experience diarrhoea, constipation, sore throat, gas and burping.

Obesity is the primary cause of GORD. This is because excess stomach fat puts pressure on organs such as the stomach. This forces stomach acids past the oesophageal sphincter and into the oesophagus. Large meals that fill the stomach have the same effect, so consider eating smaller meals. Along with fatty foods, try to avoid foods that are acidic themselves or spicy. Onions, chocolate, and gluten, as well as carbonated or caffeinated drinks, can also lead to heartburn.

Studies have shown that both alcohol and nicotine can weaken the muscles of the oesophageal sphincter, leading to acid reflux. There are also several medications that interfere with digestion or the oesophagus in a way that might increase your risk of GORD. Talk to your GP about whether your medication might be causing your acid reflux, and if other treatments are available.

Gastritis can cause symptoms of heartburn and indigestion. This is a condition where the stomach lining becomes inflamed and causes pain in the stomach. In order for it to heal, the best cause of action is to reduce the amount of acid in the stomach. Omeprazole 20mg tablets can help reduce the symptoms of gastritis until the stomach lining heals.

Why choose The Independent Pharmacy?

  • Fast - order before 3pm and receive your treatment as quickly as the next day
  • Free online consultation service with one of our UK-registered clinical team
  • Discreet packaging & confidential service - we don't include any branding or pharmacy logo on our packaging meaning you can get your treatment delivered anywhere
  • Approved by the National Pharmacy Association, General Pharmaceutical Council and Care Quality Commission.


Alternatives to Omeprazole

Antacids, such as Gaviscon, are over the counter medicines that can be taken as required. Antacids are alkali liquids or tablets that are designed to  neutralise the stomach acid. A dose can often give quick relief. There are many brands, which are available to buy over the counter. If you suffer with mild or infrequent bouts of dyspepsia you may find that antacids used as required are all that you require.

Lansoprazole is a prescription-only treatment that works in a very similar way to Omeprazole. Alternatively, ranitidine and famotidine also work to reduce stomach acid but have a different mechanism of action.


*Prescription medicines are supplied subject to a medical consultation at the discretion of a doctor.

Omeprazole dosage

Omeprazole comes in 20mg capsules, which you will take once daily. Swallow the capsule whole with a sip of water. It is important that you do not crush or chew the capsule. You can take it with or without food – many people prefer to take Omeprazole one hour before eating, such that they will not have heartburn during or after that meal.

To treat GORD, take one capsule per day for four to eight weeks. In severe cases, you may be prescribed two capsules per day. If your acid reflux is severe, your doctor may advise other treatments to deal with the causes of your acid reflux more directly.

If, for any reason, you forget to take a capsule, take it as soon as possible. However, if it is nearly time for your next capsule, skip the dose that you missed. Never double your dose to compensate for a dose that you have missed.

Omeprazole side effects

Not everyone will experience side effects when they take Omeprazole capsules, however, if you do they can include:

Digestion problems (including stomach pain, constipation, diarrhoea, and wind), headache, nausea.

If you are concerned about these effects, or if the product affects you in any other way, stop using it and talk to your doctor or pharmacist.

Omeprazole ingredients

The active ingredient contained in Omeprazole capsules is:

Omeprazole 20mg

Omeprazole capsules also contain the following inactive ingredients to make up the complete product:

Sugar spheres, sodium lauryl sulphate, disodium phosphate, mannitol, hypromellose, polyethylene glycol 6000, talc, polysorbate 80, titanium dioxide, eudragit L30-D55 (poly(methacrylic acid, ethyl acrylate)), gelatin, quinolone yellow (E104), titanium dioxide (E171)

Omeprazole warnings

Reading the following warnings carefully will help to ensure you are selecting an appropriate product.

Omeprazole capsules are unsuitable for you if you are allergic to any of its ingredients, or are allergic to any other proton pump inhibiting medicines (including lansoprazole, pantoprazole, esomeprazole or rabeprazole).

Do not take Omeprazole if you are also taking any HIV medicines, which contain nelfinavir.

Inform your doctor if you plan on taking Omeprazole while taking any of the following medicines:

  • Antifungal medicines (e.g. ketoconazole, voriconazole, itraconazole)
  • Epilepsy medication (e.g. diazepam, phenytoin)
  • Vitamin K blockers (e.g. warfarin)
  • Clopidogrel
  • HIV medicines (e.g. atazanavir, saquinavir)
  • Digoxin
  • Rifampicin
  • Methotrexate
  • Corticosteroids
  • St John's wort
  • Tacrolimus.

Omeprazole may cause complications with other diseases. See your doctor immediately if you: 

  • Suddenly lose weight
  • Have trouble swallowing
  • Have liver problems
  • Develop indigestion or stomach pain
  • Notice blood in vomit or stools.

Please read all packaging and the Patient Information Leaflet before taking any new medicine, and inform your doctor of medicines you are taking or intend to take.

Delivery & Shipping Information

Please note that due to the current situation with COVID-19, Royal Mail are experiencing some delays. This may mean that your order takes longer to arrive than you would normally expect. We are working hard to ensure that, where possible, all orders placed before 15:00 are still dispatched the same working day.


UK Orders

We offer FREE standard tracked delivery on orders over £40.

The following delivery options are available:

  • Standard Tracked Delivery - 2 - 3 day delivery - £2.95
  • Express Tracked Delivery - 1 - 2 day delivery - £4.45
  • DPD Next Day - 1 - 2 working days - £6.95
  • Special Delivery (Guaranteed before 21:00) - £8.95
  • Saturday Guaranteed before 21:00 - £10.45

Important Delivery Information

All our orders are sent out using Royal Mail (unless stated). We always aim to dispatch all Royal Mail & DPD orders received before 15:00 the same working day. Any orders received after 15:00 or over the weekend will be dispatched the next working day. Orders will not be dispatched on weekends or bank holidays.

All orders are subject to approval by our team of doctors and pharmacists. Your delivery date in the checkout is subject to your consultation being approved by our healthcare team.

All orders can be fully tracked from your dispatch email, in your online account and from any notifications from your courier.

We ensure all parcels are in plain packaging for discreet delivery of your medicines and pharmacy goods. Where possible, we will attempt to size all parcels to fit through your letterbox in tamper-proof packaging. By placing an order on our website, you confirm that it is safe and appropriate for a package containing medicines to be posted through your letterbox, if the carrier is able to do so. You should notify our customer support team if it is not safe for the package to be posted through the letterbox, for example due to animals or small children.

Deliveries containing pharmacy-only or prescription medicines may require a signature on receipt. 

Delivery is free for all NHS prescriptions.


Royal Mail


  • Fully tracked delivery
  • SMS & email notifications
  • Four-hour delivery window
  • Change delivery date directly with Royal Mail
  • Update delivery location - add a Safeplace, preferred neighbour, or update your delivery location to a local Post Office or Royal Mail Customer Service Point.

Royal Mail are the most widely recognised mail delivery company in the UK. Being on the UK’s 29 million doorsteps six days a week means they offer unparalleled price and convenience. The Independent Pharmacy uses Royal Mail’s Tracked 48, Tracked 24, and Special Delivery Guaranteed parcel services to offer reliable, fully-tracked delivery at very competitive prices. Your Royal Mail parcel will arrive with your normal daily delivery of post.

Please note: Royal Mail do not deliver on Sundays or Bank Holidays - this should be taken into account when ordering. 

If you are not home to accept your delivery, a card should be left by the Royal Mail representative. This card will provide details of where you can collect the order or how to arrange re-delivery.

Should you be unable to collect your missed delivery or arrange for your medication to be redelivered by Royal Mail, the pharmacy can resend your medication to the same, or a different address provided it has been returned to us and this happens within a 30 day window.

Once a package has been shipped with Royal Mail we advise that you are bound to the terms and conditions of their use together with the terms and conditions contained herein.

You have the right to cancel your order up to the point when your treatment is dispatched. The pharmacist must destroy any medication within 30 days of it being returned, even un-opened boxes, so we are not able to offer refunds once your treatment has been dispatched.




  • Fully tracked delivery
  • SMS & email notifications
  • One-hour delivery window
  • Change delivery date directly with DPD
  • Update delivery location - add a Safeplace, preferred neighbour, or update your delivery location to a local collection point.

DPD Local is the most innovative parcel carrier around. Thanks to their industry-leading Predict service, they provide parcel recipients with a one hour delivery window, notified by email, so you don't have to wait in all day. What's more, it enables receivers to watch the progress of their delivery on a real-time map, all the way down to a final 15 minute time-slot. 

As well as keeping customers informed at every stage of the journey, DPD believe in maximising choice and convenience. That's why DPD provide access to a suite of options both on the day of delivery and the night before, allowing customers to take delivery of their goods in a way that suits. If you wish to reschedule, you can:

  • Select an alternative delivery date
  • Opt for delivery to a nominated neighbour
  • Have the parcel left in a specified safe place
  • Collect the parcel from your local DPD Pickup Shop
  • Upgrade delivery to By 12

Please note: DPD do not deliver on Saturdays, Sundays or Bank Holidays - this should be taken into account when ordering. 

Once a package has been shipped with DPD we advise that you are bound to the terms and conditions of their use together with the terms and conditions contained herein.

You have the right to cancel your order up to the point when your treatment is dispatched. The pharmacist must destroy any medication within 30 days of it being returned, even un-opened boxes, so we are not able to offer refunds once your treatment has been dispatched.


Forwarding houses

We are unable to ship orders to mailing or forwarding houses for onwards shipping to locations outside of the UK.


BFPO Postcodes

Unfortunately we are unable to deliver medicines to BFPO postcodes.


Remote Areas

Please be aware that Royal Mail Guaranteed services are not available to all customers in the UK, especially those that live in remote postcodes. Royal Mail advise customers of the following:

We deliver by 17:30 the next working day in the following postcode areas:
AB30 - 39, 41 - 45, 51 - 56
GY9 Alderney (Channel Islands)
HS1, 3 - 9
IV21 - 28, 40 - 49, 51 - 56
KA27, 28
KW1 - 3, 5 - 15
KW16 Stromness Town only
PA20 (0&9)
PA28 - 38, 41 - 49, 76, 77
PH15, 17 - 26, 31 - 40, 49, 50


We deliver within two working days by 17:30 to the following postcodes areas:
GY1 Herm (Channel Islands)
GY9 Sark (Channel Islands)
PA60 - 75, 78
ZE2, 3


We deliver within three working days by 17:30 to the following postcode areas:
KW16 - non-Town
PH30, 41 - 44


Please note: This applies to our 'Special Delivery' and 'Saturday Guaranteed' services.


International Orders

We are currently unable to ship orders outside of the UK.

We are unable to ship orders to mailing or forwarding houses for onwards shipping to locations outside of the UK.

Need to know more about Acid Reflux & Heartburn?

Visit our advice area or contact our support team

Omeprazole 20mg Capsules Reviews

Unsure about a treatment?
Ask our medical team for impartial information and advice about any treatment we provide or medical condition that we treat before you buy.

Frequently Asked Questions

  • How do I buy generic Omeprazole capsules online?

    It's simple!

    Just select 'Start Consultation' next to the product above, or on the links below.

    You will need to fill in a simple health questionnaire so that our GPs and Pharmacists can ensure it is safe for us to supply your Omeprazole capsules to you. It only takes a few minutes, and your treatment can be delivered to your door as soon as the next working day.

  • Is it safe to buy Omeprazole capsules online?

    Yes – as long as you are buying from a website that is a legally operating and regulated pharmacy, it is perfectly safe to buy Omeprazole capsules online.

    The Independent Pharmacy is an NHS Online Pharmacy based in Bristol and has all the necessary regulation to be able to safely provide convenient access to genuine prescription treatments through our Online Pharmacy and Online Doctor.

  • What does the price include?

    The price includes the medication you have selected, the private consultation with our Doctor and, if the purchase is over £40, it also includes free standard delivery. Under £40, standard delivery is £2.95 and all items are sent using a Royal Mail Tracked Service.

  • What are the advantages of buying Omeprazole capsules online?

    There are many advantages to buying acid reflux treatments online, some include:

    • It's quick and easy- there is no need to spend time at the doctor or pharmacy.
    • Fast delivery- We offer same day dispatch before 4pm and fast delivery to your address of choice with Royal Mail.
    • Great prices- we are able to offer very competitive prices and we guarantee to beat any other Online Doctor service.
    • A wealth of information - we provide all the information you could need on Omeprazole capsules and other acid reflux treatments, in easy to digest formats, at a time that suits you.
  • Does Omeprazole interact with other types of medication? 

    Omeprazole can be taken in conjunction with a number of different types of medicine. If you are currently taking other medication, it’s important to speak with a medical professional before taking Omeprazole.You can contact us here and we will be happy to help you.

  • Does drinking milk help to reduce symptoms of heartburn and indigestion?

    Milk has been suggested for a number of years as a way to reduce symptoms of heartburn. Although milk does seem to buffer the initial symptoms of heartburn and indigestion, it could actually cause more discomfort. The fatty acids and other nutrients in milk can cause your body to produce even more acid to try and break down the milk. This method can actually make symptoms worse, which is why it’s a good idea to invest in the right medication for your needs.

  • What causes heartburn?

    Heartburn is caused by acid from the stomach travelling upwards, into the oesophagus. This can cause a burning like pain behind the breastbone and can become uncomfortable if left untreated. Some people are more prone to indigestion, like those that simply produce more stomach acid, those with structural issues (those with a weak or small valve at the top of their stomach, or those with a disease or condition that exacerbates conditions of heartburn.

    There are a number of different foods and drinks that can cause symptoms of heartburn to become worse. For example, those that drink alcohol or smoke will be at a higher risk of suffering from symptoms of indigestion and heartburn.

  • Can heartburn or indigestion cause chest pain or mimic symptoms of a heart attack?

    Yes, heartburn can cause pain in the chest, usually felt as a burning sensation behind the breastbone. Though heartburn can feel painful at the time, if its not a chronic condition (happening everyday) then it rarely causes for concern. Other complications and medical conditions can cause pain in the chest, especially persistent conditions of acid reflux. Conditions like GORD, gastric ulcers, and gallbladder attack can all cause severe chest pain that mimics the symptoms of other, more serious conditions like heart attacks and angina.

  • Can heartburn and indigestion be an early sign of pregnancy?

    In some cases, symptoms of heartburn can be caused by pregnancy. The hormone progesterone increases in the body during the early stages of pregnancy and this can cause indigestion and heartburn symptoms. Progesterone causes the body to relax, preparing it for labour. This hormone can cause the valve at the top of the stomach to relax, allowing acid from the stomach to travel up towards the oesophagus and cause pain.

    This is usually the most common during the night. If you are suffering symptoms of heartburn with no other symptoms present, then the chances of pregnancy are slim. If you are concerned about heartburn, then it’s important to speak to a professional to get a diagnosis.

    If you are pregnant or breastfeeding then it is not recommended to continue taking Omeprazole, unless specifically directed by a healthcare professional. If you are unsure whether it’s safe to continue taking Omeprazole or would like to find out about other treatments available, speak to one of our professional doctors today with a free consultation.

    Omeprazole is not suitable for infants or babies unless specifically directed by a healthcare professional during a face-to-face consultation.

Authored By:

A photo of Dr Donald Grant

Dr Donald Grant

MB ChB DRCOG MRCGP Dip.orth.med

Published on: 02-02-2017

Last modified on: 05-02-2021

Dr Don Grant is a GP with over 30 years experience and is the Clinical Advisor at The Independent Pharmacy

Reviewed By:

A photo of  Andy Boysan

Andy Boysan


Reviewed on: 05-02-2021

Next review date: 05-02-2023

Andy is a co-founder, the superintendent pharmacist and director at The Independent Pharmacy.

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