Losec Capsules (Omeprazole) 20mg


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  • Effective treatment for acid reflux, heartburn and stomach ulcers
  • Proton Pump Inhibitor medication
  • UK-based pharmacy & prescribers
  • Free online consultations

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Losec Capsules


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Losec Capsules


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Losec Capsules


Our pharmacy, clinic & prescribers are based in Greater Manchester.

Losec Capsules 20mg Information

Losec, also known as Omeprazole, is a Proton Pump Inhibitor medication. Losec reduces the amount of acid the stomach can produce, helping to treat issues such as acid reflux, gastroesophageal reflux disease (GERD) and stomach ulcers.

Medication NameLosec Capsules 20mg
Active IngredientOmeprazole
Medication formCapsule
Used to treatAcid reflux, gastroesophageal reflux disease (GERD), heartburn, indegestion and stomach ulcers
Available dosages20mg
Common side effects
Diarrhoea or stomach pain 
Nausea or vomiting 
Who is this medication suitable forMost adults
Do you need a prescription for it?Yes
How should it be used?Swallow the capsule whole with a glass of
Patient Information Leaflethttps://www.medicines.org.uk/emc/files/pil.1509.pdft

What is Losec used for?

Losec works by calming your stomach and reducing irritation and discomfort caused by excess stomach acid. This helps relieve symptoms such as heartburn and indigestion, making it an effective treatment for those suffering from acid-related stomach issues. 

How long do Losec Capsules take to work?

Generally, Losec begins to reduce symptoms like heartburn and acid reflux one to two days after starting them. Taking your Losec capsule around the same time each day helps maintain a steady level of medication in your body, which aids in effectively managing your symptoms.

Who can take Losec Capsules? 

Losec is generally suitable for most adults. However, you should not take if you:

  • Are allergic to any of its ingredients
  • Are allergic to other medicines containing other proton pump inhibitors
  • Taking a medication containing nelfinavir (used for HIV infection)

How to take Losec Capsules

For effective treatment of acid reflux symptoms, Losec should be taken daily, preferably first thing in the morning and can be taken with or without food.

If you forget to take your dose, take it as soon as possible, but if it’s 12 hours or less until your next dose, miss that dose. Do not take 2 doses to make up for the one you’ve missed. 

When you are prescribed Losec, your pharmacist or doctor will provide you with full instructions specific to your condition.

If you’re unsure how to take Losec, speak to one of our medical professionals or read the patient information leaflet.

How effective are Losec Capsules?

Losec capsules are highly effective for treating acid reflux, GERD, and stomach ulcers. They work by reducing stomach acid, which helps relieve symptoms like heartburn and allows ulcers to heal. 

A clinical study on the effectiveness of Losec (Omeprazole) in Acid Peptic Disease concluded that Omeprazole therapy is an effective treatment for APD and shows good improvement in patients suffering from ulcers and reflux oesophagitis.

Side Effects of Losec Medication

Like any medication, you may experience some side effects when taking Losec Capsules. The side effects of taking Losec include:

Common side effects

  • Headache
  • Diarrhoea or stomach pain 
  • Nausea or vomiting 

Uncommon side effects

  • Swelling of the feet and ankles
  • Disturbed sleep
  • Dizziness 

Rare side effects

  • Taste changes
  • Feeling agitated, confused or depressed
  • Eyesight problems
  • Sudden wheeziness or shortness of breath 
  • Hair loss 

For more information on the side effects of Losec, read the patient information leaflet.

Should you encounter any severe or unusual side effects, seek immediate medical attention.

Losec Capsule 20mg Ingredients 

Active Ingredient: Omeprazole 

Other Ingredients: disodium phosphate dihydrate, low-substituted hydroxypropyl cellulose, hypromellose, lactose anhydrous, magnesium stearate, mannitol, methacrylic acid, cellulose microcrystalline, macrogol, sodium lauryl sulfate, iron oxide E172, titanium dioxide E171, gelatine, silica colloidal anhydrous and paraffin liquid

Losec Capsule Warnings 

  • Store the tablets at room temperature, away from moisture and heat.
  • Keep out of the SIGHT and REACH of children.
  • Do not use after the expiry date on the pack. 


Losec Capsule 20mg FAQs

Although alcohol doesn’t change how Losec functions, it’s not advised to drink alcohol whilst taking Losec as it causes your stomach to produce more acid, which could worsen symptoms.

You can buy Losac capsules online through Click2Pharmacy’s Acid reflux clinic. We are a licensed online pharmacy, making it easy for you to get the medication you need. Just complete an online consultation for our pharmacists to review, and your prescription will be sent directly to your door.

If you’re pregnant, think you may be pregnant, planning on getting pregnant, or breastfeeding, please let one of our pharmacists know during your consultation. Although Losec is excreted in breast milk, it is unlikely to affect your child when the advised dose is taken.

Customer Reviews

Based on 68 reviews
Ibrahim Ahsan
Ibrahim Ahsan
Very helpful staff, never had any issues with this pharmacy, 100% recommend
Julie Beardsley
Julie Beardsley
Very professional service. Just like having your very own pharmacist. Brilliant
Mohammed Khan
Mohammed Khan
Just had private bloods taken short wait time very thorough good price nice lady would recommend.
Sarah Smithies
Sarah Smithies
It is great to have somewhere local that does blood testing. The staff are lovely, helpful and experienced. They fit me in last minute. There is never a wait and the results back within a day or two.
After refusal of doctors appointment same old same old ring back etc. I was invited at 5.25 to see doctor I drove over immediately. Everything fully explained and checked over I was leaving by 6pm with penicillin for strep throat. Had I followed my doctors receptionist I would probably have suffered longer and increased the chances of a worse infection.I Great efficient service.
Lisa Lowther
Lisa Lowther
Fantastic service went for blood done very fast very friendly fantastic customer service

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