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This is why we also take steps to conceal your prescription products under two layers of packaging.

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You can pay for your order using credit, debit card and bank transfer.

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About Product
Mohamed Imran Lakhi
This content has been written and checked for quality and accuracy by
Mohamed Imran Lakhi Content Administrator GPhC: 2060586 Updated on: 26/05/2020 Next review: 26/11/2020

Buy Losec Online

Losec is a prescription-only medicine which reduces the level of acid produced in the stomach, bringing relief from Gastro-Oesophageal Reflux disease (GORD), a condition commonly referred to as heartburn. Losec is available in 20mg capsules from Prescription Doctor's convenient online pharmacy.

You can safely buy Losec capsules online from our UK GPhC registered pharmacy. If your order is approved before 3pm, our dispensing pharmacy will process your order and dispatch it the same day via a next-day, discreet delivery.

What is Heartburn?

Heartburn is a condition characterised by a burning sensation around the chest. It is caused by acid reflux, when stomach acid finds its way up the oesophagus. This starts with the relaxation of the lower oesophageal sphincter, a muscular ring that connects the stomach and the oesophagus. GORD is the acronym given for persistent heartburn.

There are a number of potential triggers of heartburn, though it can be difficult to pin-point your triggers.

Some common triggers of heartburn include:

  • Acidic food (tomatoes)
  • Alcohol
  • Citrus (oranges, lemons)
  • Coffee
  • High fat food (cheese, nuts)
  • Onions and garlic
  • Pain relief medicines (ibuprofen, codeine, aspirin)
  • Spicy food

One method of determining a potential trigger of heartburn is to keep a food diary. Keep a record of the meals you eat, the time you ate them and any activities you did before and after eating them. For example, whether you had a nap after a large meal or if you eat straight after exercising.

Next to each meal, take a note of whether you experienced heartburn, how long it lasted and a rating of the pain you experienced from 0 (indicating no pain) to 10 (unbearable pain). Do take your food diary with you to your doctors appointment as it can help them assess your condition and provide actionable steps on how to prevent or treat your symptoms.

It is important to treat chronic heartburn as it can result in serious oesophageal cell damage, causing a condition called Barrett's Oesophagus. In rare cases, Barrett's Oesophagus can develop into oesophageal cancer. According to Cancer Research UK, the risk of oesophageal cancer in patients with Barret's Oesophagus is greatly reduced by up to 71% by using proton pump inhibitors, such as Losec, to treat GORD and heartburn.

How does Losec work?

Losec contains a proton pump inhibitor known as omeprazole. It prevents cells in the stomach from producing an excess of stomach acid, which can increase the risk of developing heartburn and GORD symptoms.

Losec's suppression of acid production is through H+/K+ ATPase enzyme inhibition at the stomach parietal cell secretory surface.

By blocking the enzyme, the cells produce less acid, reducing the risk of excess acid rising up the oesophagus.

You can also buy generic Losec in the form of Omeprazole capsules.

How do I take Losec?

You should always take Losec as prescribed. If you are unsure about how you should take Losec, consult your doctor or pharmacist for assistance.

The doctor will determine an appropriate course of treatment for you, depending on your age and condition.

Side effects and cautions

Losec may not be suitable for you. Before taking Losec, we encourage you to read the patient information leaflet (PIL) enclosed with your medicine for more information regarding the safety of this medicine.


Do not take Losec if you are allergic to:

  • Any of the ingredients of Losec (located in the patient information leaflet)
  • Omeprazole or similar medicines containing proton pump inhibitors (pantoprazole, lansoprazole, esomeprazole)

If you experience the signs and symptoms of an allergic reaction to Losec, stop taking the medicine immediately and speak to your doctor or go straight to your nearest accident and emergency department.

Signs of an allergic reaction include:

  • Difficulty breathing
  • Difficulty swallowing
  • Rash (hives)
  • Swelling of the lips, face, tongue, and throat


Do not take Losec if you:

  • Are taking a medicine containing nelfinavir (used for HIV infection)

You should inform our doctor of all the medicine you take, including those prescribed to you, bought over-the-counter, and health supplements.

Pregnancy and breastfeeding

Before taking Loesc, inform our doctor if you are pregnant, think you may be pregnant, plan on becoming pregnant or breastfeeding. Our doctor will be able to determine whether Losec is safe for you to take while breastfeeding.

Side effects

All medicines carry potential of causing side effects, though not everybody gets them. We encourage you to familiarise yourself with the patient information leaflet (PIL), which comes enclosed with your medicine, before taking Losec.

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

  • Benign polyps in the stomach
  • Constipation
  • Diarrhoea
  • Flatulence
  • Headache
  • Nausea
  • Stomach pain
  • Vomiting

Uncommon side effects (may affect up to 1 in 100 people):

  • Changes in blood tests that check how the liver is working
  • Dizziness
  • Fatigue
  • General feeling of malaise (feeling unwell)
  • Insomnia
  • Raise skin rash (hives)
  • Skin itching
  • Swelling of the feet and ankles
  • Tingling of the extremities (pins and needles)
  • Vertigo (spinning sensation)

This is not an exhaustive list of side effects. Further information about the side effects of this medicine can be found in the patient information leaflet (PIL).

Reporting side effects

If you experience any side effects, whether listed above or in the patient information leaflet, speak to your doctor or pharmacist for assistance. You can use the NHS' Find A Pharmacy service to locate your nearest pharmacist for advice.

Pregnancy and breastfeeding

Speak to your doctor before taking Losec if you are pregnant, think you might be pregnant, plan on becoming pregnant or breastfeeding.

If you become pregnant while taking Losec, inform your doctor as soon as possible.

Losec does pass through breast milk in small amounts, though it is unlikely to affect the development of your child. Nonetheless, you should speak to your doctor before taking Losec if you are breastfeeding.

Your doctor can determine the safety of Losec for you and your baby if you are pregnant or breastfeeding.

Other safety information

Always speak to your doctor before you buy Losec online from Prescription Doctor.

Always keep medicine out of the sight and reach of children and pets.

Never take Losec past the expiry date printed on the packaging. The date refers to the last day of the specified month.

Do not discard medicine via household or water waste. Take any unwanted or expired medication to your local pharmacy and ask them to dispose of it safely on your behalf.

Never share your medicine with anyone else, even if they are experiencing the same symptoms as you.

Frequently asked questions

What do I do after forgetting to take Losec at the recommended time?

If you forget to take Losec, take it as soon as you remember and continue dosage as recommended by the doctor. Never take more Losec to make up for skipped dose.

What do I do if I take more than the prescribed Losec dose?

If you accidentally take more Losec than you should, contact your doctor or a pharmacist as soon as possible.

Can I consume alcohol while taking Losec?

It is unlikely that alcohol will negatively interact with omeprazole. Avoiding or limiting alcohol consumption, however, is recommended to avoid worsening of heartburn symptoms.

Does Losec affect my ability to operate machinery or drive?

While it is unlikely Losec will affect your ability to drive or operate machinery, you should avoid these activities if you experience side effects, such as dizziness or visual disturbances, until you feel well enough to do so.

How long does Losec take to work??

Losec takes 2 to 3 days to start working. It might take up to 4 weeks prior to noticing any change in your symptoms.

Can I buy Losec over-the-counter?

Losec is a prescription-only medicine and cannot be bought over-the-counter. Following an online medical consultation, you can buy Losec from prescription doctor.

Can I drink coffee with Losec?

You may be advised to avoid caffeinated beverages (coffee, cola and energy drinks) while taking Losec. Caffeine can exacerbate the symptoms of heartburn for some people.

Table of contents

Buy Losec Online

How does Losec work?

How do I take Losec?

Side effects and cautions

Frequently asked questions


AstraZeneca UK Limited, 2017. Losec Capsules 20mg: Summary of Product Characteristics.

NHS, 2017. Heartburn and Acid Reflux.

Treatment information

  • Product Name: Losec
  • Manufacturer: AstraZeneca
  • Active Ingredient(s): Omeprazole
  • Administration: Oral
  • Presentation: Capsules
  • Available Strength: 20 mg
  • Exemption: Prescription only
  • Application: Men and women over 18+
  • Dosage: As prescribed by the doctor
  • Description: Losec is a heartburn treatment which contains omeprazole
  • Drug Class: Proton pump inhibitor
  • Alcohol Consumption: Avoid or limit alcohol consumption
  • When Pregnancy: Tell our doctor if you are pregnant, think you may be pregnant or planning on becoming pregnant before taking Losec
  • When Breastfeeding: Tell our doctor if you are breastfeeding before taking Losec
Click here to view the Losec - Patient Information Leaflet

Heartburn Alternatives


  • Reduces stomach acid
  • Taken once daily
  • Relieves heartburn symptoms quickly
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Nexium (Esomeprazole)

Nexium (Esomeprazole)
  • Prevents heartburn
  • Lasts 24 hours
  • Can be taken with or without food
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  • Decreases stomach acid
  • Variety of doses
  • Effective against heartburn symptoms
View Treatment


  • Easy to swallow tablet
  • Taken once daily
  • Treats and prevents heartburn symptoms
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Ranitidine (Zantac)

 Ranitidine (Zantac)
  • Fast acting
  • 12 hours relief
  • Relieves heartburn and indigestion
View Treatment

Zoton FasTab

Zoton FasTab
  • Dissolves on the tongue
  • Fast acting
  • Branded lansoprazole from Pfizer
View Treatment
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