Losec MUPS
- Effective treatment for Acid Reflux
- Can treat Heartburn, Indigestion and gastrointestinal ulcers
- Stops the production of stomach acid

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What is Losec?
Losec is the brand name for omeprazole, which is a prescription medication used to treat gastroesophageal reflux disease (GERD) and acid reflux.
Losec contains the active ingredient omeprazole, which inhibits the activity of the proteins known as proton pumps; these pumps produce stomach acid. It is part of a group of medicines that are called proton pump inhibitors (PPIs).
You can buy Losec either in the form of capsules or as a multiple unit pellet system (Losec MUPS).
The 20mg (28 capsules) dosage is available for next day delivery at Medicine Direct's online pharmacy.
What is Losec used for?
Losec is an effective treatment for anyone suffering from acid reflux, providing a cure for anyone with excessive stomach acid. Excess acid in the stomach can be painful and lead to stomach ulcers or the erosion in the lining of your throat.
As well as treating acid reflux, taking Losec can be used to treat gastrointestinal ulcers and heartburn.
Who can take Losec?
Losec and other omeprazole products are not suitable for everyone. If you have any concerns or doubts, you should contact your pharmacy or speak to your doctor before you take either Losec MUPS or tablets.
If you are pregnant, trying to get pregnant or are breastfeeding, it is not recommended that you take Losec.
Losec can interact with several different medicines, please refer to our Warnings and Drug Interactions tab for the full list of medicines that can have an adverse effect when taken with Losec.
Do not take this medicine without speaking to your doctor if you have any of the following allergies:
- An allergy to any other medicines, preservatives, foods or dyes
- Any medicine which contains a proton pump inhibitor
- Any ingredients listed in the medicine's leaflet
- Difficulty swallowing
- Weight loss
- Loss of blood
- You are allergic to omeprazole or any other ingredients in Losec
- If you are taking any other medicines, prescribed or not
- If you have any liver problems
Possible side effects
As is the case with all medicines, omeprazole medicines do have the risk of certain side effects.
Losec is considered a safe drug to take and most people who use it will not experience any adverse effects from the medicine. For those who do experience an adverse effect, they are usually mild and will not last for very long.
Common side effects when using Losec include:
- Stomach pain
- Constipation
- Headaches
- Wind
- Feeling sick
- Being sick
- Diarrhoea
- Dizziness
- Sleepiness
- Difficulty in falling asleep
You may also develop an itchy or lumpy rash on your skin. Losec may cause swelling in your feet or ankles.
If these symptoms persist, you should speak to your doctor or pharmacist.
Please refer to our Side Effects tab for the full list of more serious reactions you may experience while taking Losec. If any of these symptoms appear, you are advised to contact 999 or go to A&E immediately, especially if you display symptoms of a severe allergic reaction.
Losec Dosage
Unless instructed differently by your doctor, you should take omeprazole medication once a day, preferably in the morning. Always read the patient information leaflet before taking any medicine.
For adults:
Take one dose of 20mg each day. This may vary from between 10mg and 40mg each day, depending on the severity of the condition you are being treated for.
For children:
Children with reflux oesophagitis, and who weigh 10-20kg, will usually be prescribed 10mg once a day.
For children who weigh more than 20kg, the recommended dose is 20mg.
Losec (omeprazole) capsules should be swallowed whole and taken with a glass of water.
If you have trouble swallowing capsules whole, you can open the capsule up over an empty glass and suspend it in a slightly acidic drink, such as fruit juice or yogurt, and take within 30 minutes.
Do not chew or crush the capsules as this will render the medicine ineffective.
Most people will experience the benefit of this medicine within the first hour after taking it, but it should be noted that in some cases it can take up to four days for the full effects to take hold. If your symptoms have not been alleviated by this time, we advise you to go back to your doctor for advice.
Losec can be taken with or without food, but try to take it at the same time each day. If you forget to take a dose, take it as soon as you remember, then go back to taking it at your regular time the next day.
Do not take two doses in the same day.
Losec FAQ's
What is Losec?
How does omeprazole relieve acid reflux/indigestion?
How soon does omeprazole take effect?
Who is not suitable for omeprazole?
Can I buy Losec over the counter?
Are there any drugs which might interact with omeprazole?
Are there any warnings or special precautions for use?
Is omeprazole safe in pregnancy or breastfeeding?
When would taking omeprazole become an emergency?
Can I buy omeprazole online?
Is it safe to purchase Losec online?
What does the price include?
What are the advantages of buying Losec online?
How do I cope with Losec side effects?
Can I take Losec with over the counter antacids?
Can I drink alcohol when taking Losec?
Losec Side Effects
Common side effects of Losec can be found on the main page. It is rare to experience an adverse effect to an acid reflux treatment such as omeprazole, but more serious reactions could include:
- Yellow skin, tiredness or dark urine (possible signs of liver problems)
- Joint pain and a red skin rash (Could be signs of subacute cutaneous lupus erythematosus, which can occur if you have been taking omeprazole for a prolonged period)
- Fever
- Muscle pain or weakness
- Pins and needles
- Increase in sweating
- Blurred vision
- Sore or dry mouth
- Increase in breast size (men)
- Depression or mood changes
- Confusion
- Hair loss
- Tremor
If you experience any of these effects, you should contact your doctor straight away.
In very rare cases, it is possible to have a serious allergic reaction to Losec. You should call 999 or go to A&E immediately if you experience any of the below:
- Wheezing
- A skin rash which is red, swollen, peeling, itchy or blistered
- Swelling of the mouth, lips, face, tongue or throat
- Tightness in the chest or throat
- Difficulty in breathing or speaking
You should always read the information leaflet thoroughly before taking any medicines.
Losec Warnings and drug interactions
Pay close attention to all of the below warnings to ensure Losec is an appropriate medicine for you to use.
As with all medicines, you should read the information contained within your medication very carefully before taking it.
Omeprazole capsules are not suitable for anyone who is allergic to any of the ingredients used within the medicine. You should also not take it if you are allergic to any other PPI medicines, such as lansoprazole, pantoprazole or esomeprazole.
Do not use Losec if you are taking any medicines to treat HIV which contain nelfinavir.
You must inform your doctor if you are taking any of the following medicines:
- HIV medicines
- St John's Wort
- Vitamin K blockers, such as warfarin
- Epilepsy medication
- Tacrolimus
- Digoxin
- Clopidogrel
- Corticosteroids
- Anti-fungal medicines
- Rifampicin
- Methotrexate
Omeprazole products like Losec can also cause complications when you have other conditions.
Speak to your doctor if you have any of the following:
- Blood in your vomit
- Blood in your stools
- Liver problems
- Sudden weight loss
- Develop stomach pain or indigestion
Losec Ingredients
Each Losec capsule contains omeprazole 10, 20 or 40 mg as the active ingredient.
Inactive ingredients are: Mannitol (E421), hydroxypropyl cellulose, microcrystalline cellulose (E 460), lactose-anhydrous, sodium lauryl sulphate, sodium phosphate (dibasic dihydrate), as enteric-coated granules in bottles of 30 capsules.
This content has been written by our Superintendent Pharmacist Hussain Abdeh and has been medically reviewed by our Pharmacist Sonia Khan
Hussain Abdeh
MPharm: 2211840
Pharmacist Independent Prescriber
How it works - get your medicine in 3 simple steps
- 1 Choose your treatment Select the treatment or medication you need and answer a few questions online regarding your condition.
- 2 Online consultation Our Independent Prescribers will review your questions and assess your suitability for the medication.
- 3 Receive your delivery Your medication is dispensed and delivered directly to you from our UK based Pharmacy.
