Buy Losec online to help get your heartburn under control

  • Proton pump inhibitor which prevent excess production of stomach acid
  • Helps treat stomach ulcers, heartburn, acid reflux and gastroesophageal reflux disease (GORD).
  • Available from £19.99 + prescription fees and delivery costs

Our prices

Medicine Strength Quantity Price Stock
Losec capsules10mg28 capsules£19.99In Stock
Losec capsules10mg56 capsules£29.99In Stock
Losec capsules20mg28 capsules£25.99In Stock
Losec capsules20mg56 capsules£48.99In Stock
Losec Orodispersible20mg28 tablets£24.99In Stock
Losec Orodispersible20mg56 tablets£46.99In Stock
Prices exclude a prescription fee. This treatment requires a quick online consultation,
which a doctor will review to determine if a prescription is appropriate.

Safe and discreet

  • Safe and regulated treatments
  • 100% discreet and confidential
  • UK qualified doctors
  • Fully registered UK pharmacy


Virginia Chachati

Reviewed by Virginia Chachati MPharm
(2013, University College London)
GPhC Registration number: 2087654

Information last reviewed 03/07/2021


What is Losec?

Losec is a type of medicine known as a proton pump inhibitor which reduces excess stomach acid production. It's used to treat conditions like stomach ulcers, heartburn, acid reflux and gastroesophageal reflux disease (GORD).

How does Losec work?

The active substance in Losec is omeprazole, which blocks proton pumps in the lining of the stomach to reduce acid production. This allows stomach ulcers to heal and acid reflux to ease off.

Losec summary


Once tablet taken once daily,

Type of Medicine

Proton pump inhibitor (PPI)


Inhibits the final step in the production of stomach acid, reducing the total acid in the body

Available Size

28 or 56 tablets

Available Strengths

10mg or 20mg

Active Ingredient



From 54p per tablet

Side Effects

Can include nausea, vomiting, headaches, dizziness, drowsiness, itchy or lumpy rash, trouble sleeping, diarrhoea, flatulence


Active ingredients

The active ingredient in Losec is omeprazole.

Inactive ingredients

The inactive ingredients in Losec are cellulose microcrystalline, glycerol monostearate 40-55, hydroxypropylcellulose, hypromellose, magnesium stearate, methacrylic acid – ethyl acrylate copolymer (1:1) dispersion 30 per cent, sugar spheres, synthetic paraffin (NF), macrogol (polyethylene glycol 6000), polysorbate 80, crospovidone, sodium hydroxide (for pH-adjustment), sodium stearyl fumarate, talc, triethyl citrate, iron oxide E172 and titanium dioxide E171.

Please Note: Different generic brands of Losec can contain different inactive ingredients than those listed above. Please check the patient information leaflet required for full details


How to take Losec

Losec is usually taken once daily in the morning and can be taken with or without food. The amount you need to take will depend on your condition and symptoms, so always follow the instructions given by your doctor. For indigestion the dose is 10 to 20 mg. For heartburn, acid reflux and stomach ulcers the dose is 20 to 40 mg. If you need to take Losec twice a day, then take one tablet in the morning and the other in the evening.

Side Effects

Losec side effects

Common side effects of Losec include: 

  • Headaches
  • Nausea
  • Wind
  • Vomiting 
  • Diarrhoea  
  • Constipation 
  • Dizziness 
  • Drowsiness 
  • Trouble sleeping 
  • Rash which may be itchy or lumpy

Rare side effects of Losec may include: 

  • Joint pain alongside a red skin rash
  • Jaundice 
  • Allergic reaction (rash, trouble breathing, wheezing, swollen tongue, face, lips or throat, tightness in the chest or throat) 

If you experience any of those symptoms then seek medical attention right away.

How to cope with Losec side effects

Avoid eating rich or spicy food if you feel nauseous after taking Losec. Drink frequent sips of water to prevent dehydration. Try to stick to smaller meals. Take your time eating and drinking if you have stomach pain and try to rest. Holding a heating pad or hot water bottle against your tummy can help to soothe the discomfort. Drink plenty of water, eat fibre rich foods and exercise regularly to help relieve constipation. Avoid foods like onions, peas, beans and lentils to prevent wind.


Consult your doctor before taking Losec if: 

  • You have had an allergic reaction to Losec, omeprazole or a similar medicine in the past
  • You have problems with your liver
  • You are waiting to have an endoscopy

Drug interactions

Losec may interact with the following medicines: 

  • Ketoconazole 
  • Itraconazole 
  • Posaconazole
  • Voriconazole
  • Digoxin
  • Diazepam
  • Phenytoin
  • Blood thinners
  • Rifampicin 
  • Atazanavir
  • Tacrolimus
  • St John's wort
  • Cilostazol
  • Saquinavir
  • Clopidogrel
  • Erlotinib
  • Methotrexate
  • Nelfinavir

It's always a good idea to tell your doctor about any additional medicines you are taking before being prescribed something new. This is to ensure they will not interact with each other or cause unwanted side effects.

Can I take Losec with over the counter antacids?

You can take Losec either two hours before or two hours after an over the counter antacid if necessary. Check with your pharmacist to make sure the combination is suitable.

Can I take Losec during pregnancy?

Speak to your doctor before using Losec if you are pregnant or planning a baby.

Can I drink when taking Losec?

Losec does not interact with alcohol, but drinking alcohol can cause extra stomach acid production and might make your symptoms worse. 

Treatment Options

Losec vs Losec MUPS

Losec MUPS are dispersible tablets which dissolve in water. These are designed for people who find it difficult to swallow tablets and are suitable for children too. Losec is prescribed as capsules which are swallowed whole.

Losec vs omeprazole

Omeprazole is the active ingredient in Losec. Losec is a brand name for omeprazole, and omeprazole is the generic name of the medicine. They work in the same way.

Prices from:

Start your consultation now

We’re a fully regulated pharmacy, with qualified doctors and happy customers


Quick and discreet

Very good efficient service. No problems. I recommend Dr Felix highly.


What is your gender?


Quick and discreet

Found the website very user friendly - and the prescription approved and dispatched promptly. Also found the prices to be very attractive. Would not hesitate to recommend Dr Felix to others.