from
£25.99
Losec is an acid reflux treatment, also available as a generic product omeprazole. Losec is a proton pump inhibitor that blocks the production of acid in the stomach. It is also available as Losec Mups, which are dissolvable in water.
Buy Losec tablets from Chemist Click, a trusted UK online pharmacy. Choose from Losec 20mg capsules or Losec mups dispersible tablets. Once approved, your medication will be dispatched using our next day delivery service.
Name & Dosage | x28 Capsules | x28 Tablets |
---|---|---|
Losec 20mg Capsules | £28.99 | |
Losec MUPS 20mg Tablets | £25.99 | |
Medication Class | Proton pump inhibitor (PPI) |
---|---|
Mechanism of action | Reduced stomach acid production |
Active ingredient | Omeprazole |
Strength | 20mg |
Effective within | 2-3 days |
Dosage Instructions | Taken once daily |
Manufacturer | AstraZeneca |
Use with alcohol | Not recommended |
Losec 20mg is an acid reflux medication which treats symptoms of heartburn and acid reflux. It contains the active ingredient, omeprazole.
To treat acid reflux, the recommended dose is 10 mg or 20 mg once a day. Your doctor could increase your dose to 40 mg once a day. You can take Losec long term if you have chronic acid reflux; however, this requires a prescription from your doctor.
Important note: You should not take Losec for more than 14 days unless this is on the advice of your doctor. If your symptoms get worse or do not improve, consult your GP.
You should experience relief within 2-3 days after using Losec. However, you should give it around one month to see the full effect of this medication. If you do not experience any relief from symptoms after 1-2 weeks, you should see your doctor.
If you miss a dose of Losec, you should take a tablet as soon as you remember. If it is close to the time of your next dose, skip the missed dose, and go back to your regular regimen. Do not take two doses at the same time or an extra dose to make up for the missed dose.
You should see your doctor if:
Losec vs Nexium
Losec has the active ingredient omeprazole, and Nexium contains the active ingredient esomeprazole. They both belong to the class of drugs known as proton pump inhibitors, and both work to reduce the amount of acid that the stomach produces. Clinically, there is not much difference between Losec and Nexium.
Omeprazole vs Losec
Losec is the branded version of omeprazole. It was one of the original brand names under which omeprazole was marketed when it first became available. Both Losec and omeprazole tablets contain the same active ingredient and work in a similar way.
There are ways in which you can combat symptoms of acid reflux such as heartburn, an unpleasant taste and bloating. You could try to adjust your lifestyle including:
Active ingredient: Omeprazole
Inactive ingredients: Disodium phosphate dihydrate, hydroxypropylcellulose, hypromellose, lactose anhydrous, magnesium stearate, mannitol, methacrylic acid – ethylacrylate copolymer (1:1) dispersion 30 per cent, cellulose microcrystalline, macrogol (polyethylene glycol 400), sodium laurilsulfate, iron oxide E172, titanium dioxide E171, gelatine, printing ink (containing shellac, ammonia, potassium hydroxide and black iron oxide E172), silica colloidal anhydrous and paraffin liquid
How Do You Take Losec?
Take one tablet around 30-60 minutes before breakfast. The best time to take Losec is in the morning. You should sit upright when taking the capsule and swallow it whole with a glass of water. Do not crush or chew the capsules. They contain coated pellets, which stop the medication from being broken down by the acid in your stomach.
Serious side effects are possible; however, these are rare. Stop taking Losec and contact your doctor immediately if you experience any of the following side effects:
Common Side Effects (1 in 10 people affected)
Uncommon Side Effects (1 in 100 people affected)
You should report any new and exceptional symptoms and changes. It is likely you’ll be monitored if you are taking Losec for more than a year. Long-term use of Losec can increase your risk of fracture in the hip, wrist or spine. You should tell your doctor if you notice a rash on your skin, as you may need to stop your treatment.
Can I Take Losec with Other Medications?
Losec is an effective remedy for indigestion and is safe to take with most medications. However, if you are taking any of the following, you should consult your doctor first before taking Losec:
You should seek advice from your doctor or pharmacist if you are pregnant or wanting to get pregnant and plan to use Losec. The active ingredient, omeprazole, is safe to take during pregnancy, however treating indigestion with lifestyle changes instead of medicine may be preferable.
Losec’s active ingredient omeprazole is passed through breast milk but is not likely to influence the baby when used in therapeutic doses. If you are breastfeeding your doctor will decide whether you can take Losec.
For more information about Losec acid reflux treatment, take a look at the patient information leaflets below:
Losec 20mg is a prescription only medicine and not available over the counter.
Yes, Losec MUPS are dispersible, designed to be taken either swallowed whole or dispersed in water.
Our clinical advisers would not recommend drinking with omeprazole. Alcohol typically increases the amount of acid produced by the stomach therefore refraining from drinking will help ensure you get the maximum benefits of the treatment.
product rated 5/5
Losec is dearer than the generic omeprazol but it's the only one that works for me. You can't be cheap when it comes to your health.
By Steve White (via TrustPilot)Superintendent Pharmacist
Written by Chemist Click
First created 17th April 2025
Last reviewed 1st October 2025
Our team of experienced pharmacists and healthcare professionals are dedicated to providing the highest level of care and service to every customer, ensuring that they receive the best possible healthcare experience.
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