Skip to main content
Pharmacy Online - Home

Losec

Losec

Images for illustrative purposes only

Prescription Range

Losec is the branded version of Omeprazole. It is used to treat conditions such as chronic acid reflux, stomach ulcers, gastroesophageal reflux disease (GORD) and heartburn. It works by preventing certain cells within the stomach lining from producing acid. This leads to a decrease in gastric acid refluxing up towards the respiratory tract and causing symptoms associated with all the conditions above. It is recommended that the patient take a daily dose regularly for therapeutic results to be at its most effective.

  • Provides up to 24 hours relief from stomach pain caused by excess acid
  • Gastro resistant capsule to treat acid reflux and heartburn
  • Branded version of Omeprazole
Acid Reflux
General Health
Price
£14.89

* Some options are not available with your selection

Losec

Strength: 10mg

Pack Size: 28 Capsules

£14.89

Looking for Next Day delivery?

Order before 15:30 for next day delivery on working days

Losec 20 mg hard gastro-resistant capsules or Losec MUPS, a brand name of Omeprazole, is a drug which is used to help reduce the production of stomach acid to inhibit the symptoms of acid reflux and indigestion.

This particular brand comes in both the full strength and half strength of Omeprazole. It is a medicine that belongs to the family of drugs known as proton pump inhibitors (PPI).

There is always a risk of side effects with all medications. Some of these can be quite mild and can subside over time. Others are more serious and should be reported to your GP right away if you experience any side effects.

Please contact a member of our team if you are concerned about any potential side effects that may occur when taking Losec.

Common side effects include:

  • Nausea
  • Dry mouth
  • Diarrhoea
  • Abdominal pain
  • Constipation
  • Dizziness
  • Headache
  • Recurrent vomiting
  • Muscle weakness
  • Muscle pains

There are some rare yet severe side effects associated with Losec, including a severe allergic reaction, or severe liver disease.

You should seek medical attention if you experience any adverse effects, including yellow skin, difficulty breathing, or joint pain along with a red skin rash, especially in parts of your body exposed to the sun, such as your arms, cheeks and nose.

Other adverse reactions include: Steven Johnson syndrome, and toxic epidermal necrolysis.

What are Losec capsules used to treat?

Losec capsules are used to treat:

  • Gastric and duodenal ulcers
  • Relapse of duodenal ulcers
  • Gastric ulcer
  • Reflux oesophagitis
  • Symptomatic gastroesophageal reflux disease
  • Zollinger-Ellison syndrome
How does Losec treat duodenal ulcers?

For patients with duodenal ulcers, the recommended dose is Losec 20 mg capsules taken once daily. Ulcers should begin to heal within two weeks.

If ulcers don't clear up within that time, a further two week treatment can be prescribed. If necessary, Losec 40 mg tablets can be prescribed.

To prevent a relapse of a duodenal ulcer, the recommended daily dose is 20 mg once daily.

How does Losec treat gastric ulcers?

For patients with gastric ulcers, the recommended daily dose is 20 mg, taken once daily. Treatment is usually effective within four weeks.

How does Losec treat NSAID associated gastric and duodenal ulcers?

For effective treatment of NSAID associated gastric and duodenal ulcers, the recommended daily dose is 20 mg.

How do Losec capsules treat acid reflux?

Again, the recommended daily dose for effective treatment is 20 mg, with a healing time of approximately four weeks.

What is the difference between prescription and over-the-counter PPIs?

Both prescription and over-the-counter PPIs contain the same active ingredients. They work in the same way, but OTC medications may contain a lower dose than losec (omeprazole)

Are PPIs Safe?

Long-term use can cause severe proton pump inhibitor side effects. Kidney disease, bacterial infections and bone fractures are some of the PPIs’ most serious side effects.

You should only use this medication long term if advised by a healthcare professional.

Do not take PPIs if you have a hypersensitivity to the active substance or any of the listed ingredients, including magnesium stearate, silica colloidal anhydrous, potassium hydroxide, lactose anhydrous, polyethylene glycol, ethyl acrylate copolymer, black iron oxide, cellulose microcrystalline, disodium phosphate dihydrate, titanium dioxide, sodium laurilsulfate, and methacrylic acid.

Proton pump inhibitors have been associated with cases of subacute cutaneous lupus erythematosus. If lesions occur, discontinue use of PPIs.

How do you take a proton pump inhibitor like Losec (omeprazole)?

Take Losec on an empty stomach, about 30 minutes to one hour before eating breakfast. In the case of a missed dose, take it as soon as you remember. If it's less than four hours until your next dose, do not take it.

How long will I have to keep taking proton pump inhibitors?

PPIs are generally supposed to be taken for two to eight weeks, depending on the condition being treated.

This prescription only medicine is not suitable for long term treatment.

Can I drink alcohol?

Drinking alcohol while taking PPIs can result in increased side effects and worsening of acid reflux.

Can I take Losec while breast feeding?

Losec is excreted in breast milk. While it is unlikely to affect the child, speak to your doctor immediately if you have any concerns.

Leaflets

Before taking any medicines, regardless of whether they are over the counter or prescription-only, it is essential to always read the patient information leaflet.

Patient Information Leaflet

Umar Razzaq, MPharm | University of Strathclyde, Clinical Pharmacist.
Content Written by:Umar RazzaqMPharm | University Of Strathclyde
Date Written:01/03/2024
Role:Clinical Pharmacist
Nish Fayyaz, MPharm | University of Strathclyde, Pharmacist.
Medically Reviewed By:Nish FayyazMPharm | University Of Strathclyde
Date Checked:30/05/2025
Role:Pharmacist
Fully inspected and regulated service
UK registered pharmacy
Approved UK-licensed treatments
Discreet next day delivery