Losec

Acid reflux/indigestion or heartburn are terms used interchangeably to describe the burning pain caused by stomach acid.
Get prescription acid reflux treatment such as regular Losec (Omeprazole) or Zantac (Ranitidine) for people with severe or ongoing acid symptoms.

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Strength Quantity Price
10mg28 capsules19.99
10mg56 capsules29.99
20mg28 capsules24.99
20mg56 capsules59.98
Prices exclude a prescription fee. Find out more

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About

What is Losec?

Losec is a type of medicine called a ‘proton pump inhibitor’ which reduces excess stomach acid. 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 has an effect on the proton pumps, which are found in the lining of the stomach and produce acid to digest food. Omeprazole stops proton pumps from producing too much acid, allowing stomach ulcers to heal and acid reflux to ease off. 

Ingredients

Active ingredients

The active ingredient contained in Losec is omeprazole magnesium.

Inactive ingredients

The inactive ingredients contained 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 Lose can contain different inactive ingredients than those listed above.

Dosage

How to take Losec

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

Side Effects

Losec side effects

Common side effects include: 

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

Rare side effects 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. 

Contraindications

Consult your doctor before taking Losec if: 

  • You have had an allergic reaction to omeprazole or any other medicine in the past
  • You have problems with your liver
  • You are waiting to have an endoscopy

Drug interactions

Losec is not suitable if you are taking Nelfinavir to treat HIV. 

Losec may also interfere with the following medicines: 

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

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

How to cope with Losec side effects

Avoid eating rich or spicy food if you encounter nausea and take your tablets with or after a meal. Drink frequent sips of water to prevent dehydration if you are sick and stick to smaller meals. Take your time eating and drinking if you have stomach pain and try to rest. Holding a heat pad or hot water bottle against your abdomen can help to soothe the discomfort. Drink plenty of water, eat fiber rich foods and exercise if you are constipated. Avoid foods like onions, peas, beans and lentils to prevent wind. 

Can I take Losec with over the counter antacids?

You can take Losec alongside an over the counter antacid if necessary. Ensure you leave a 2 hour gap between taking the two different medicines and check with your pharmacist to make sure the combination is suitable. 

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. Standard Losec is prescribed as capsules which are swallowed whole. 

Losec vs Omeprazole

Omeprazole is the active ingredient within Losec and the generic name of the medicine. Losec is a brand of Omeprazole, both are essentially the same thing. 

Q&A

Can I take Losec during pregnancy?

Losec is safe to take during pregnancy but it's usually recommended to try other methods to relieve indigestion before taking medication. For example, eating small meals, avoiding spicy and fatty foods and sleeping with your head propped up above your chest. 

Can I drink when taking Losec?

Losec does not interfere with alcohol but drinking alcohol can induce excess stomach acid and is likely to exacerbate your symptoms. 

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