(Images are for illustration purposes only.)
  • UK Meds Money Bag Icon

    All inclusive service

    No hidden fees
  • UK Meds Delivery Icon

    Next Day Delivery

    Discreet Packaging
  • UK Meds Prescription Icon

    Prescription Included

    Via our online assessment


Losec contains the active ingredient omeprazole. It is a medicine in the proton pump inhibitor class, reducing the amount of acid produced by the stomach.

UK Meds Order Now


In stock
Please note: you must be signed in to start a consultation, once approved by one of our registered partner doctors, we will then dispatch your medication.

UK Meds asked our favorite doctor, Dr. Christian Jessen, to explain Acid Reflux. Below is what he has to say.

Acid reflux, also known as indigestion, heartburn or gastroesophageal reflux disease is a very common condition which is characterised by a burning or gnawing pain, usually felt around the middle of the lower chest area. It's caused by acid escaping up into the esophagus from your stomach. Doctors would consider you to have acid reflux if you feel the symptoms of heartburn more than twice in a week.

While the lining of your stomach is adapted to protect it from the strong stomach acid, your esophagus is not. If the muscle which prevents acid leaking up from the stomach into your esophagus fails, the acid can irritate it causing pain, which is often felt just after having a meal.

There are a number of over the counter prescription medications which can help with the discomfort of acid reflux by reducing the amount of acid made in the stomach, such as Esomeprazole, Lansoprazole and Omeprazole, and you can find them here at UK Meds.

- Dr. Christian Jessen

The video and article above is for information purposes only. They are not intended to diagnose a condition or prescribe a medicine. If you have any specific concerns about your health, please consult your GP or use our online doctor's service. You can follow Dr. Christian Jessen online on his Twitter account.

Read some of UK Meds 5 star reviews

What is Losec?

Omeprazole is a generic drug used to treat certain conditions where there is too much acid in the stomach. It is used to treat gastric and duodenal ulcers, erosive esophagitis, and gastroesophageal reflux disease (GERD). GERD is a condition where the acid in the stomach washes back up into the esophagus. Omeprazole is a proton pump inhibitor (PPI). It works by decreasing the amount of acid produced by the stomach.

Losec is used to treat the following conditions in adult patients:

  • Gastroesophageal reflux disease or GERD
  • Ulcers in the upper part of the intestine or stomach
  • Ulcers infected with Helicobacter pylori bacteria
  • Ulcers caused by NSAIDs
  • Too much acid in the stomach due to a growth in the pancreas

Losec (Prilosec, Zegerid) belongs to group of drugs called proton pump inhibitors. It decreases the amount of acid produced in the stomach. Losec is used to treat symptoms of gastroesophageal reflux disease (GERD) and other conditions caused by excess stomach acid. It also goes by the name of Omeprazole. It is also used to promote healing of erosive esophagitis (damage to your esophagus caused by stomach acid).

Losec Terms

LosecLosec UK
Losec PillsLosec Pills UK
Losec TabletsLosec Tablets UK
Losec 20mgLosec 20mg UK
Buy LosecBuy Losec UK
Losec OnlineLosec Online UK

Losec for Stomach Acid

  • Losec may also be given together with antibiotics to treat gastric ulcer caused by infection with helicobacter pylori (H. pylori).
  • Losec is not for immediate relief of heartburn symptoms.
  • Heartburn is often confused with the first symptoms of a heart attack. Seek emergency medical attention if you have chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, and a general ill feeling.
  • You should not take this medication if you are allergic to Losec or to any other benzimidazole medication such as albendazole or mebendazole.
  • Ask a doctor or pharmacist if it is safe for you to take Losec if you have liver disease or heart disease, or low levels of magnesium in your blood.

Some conditions are treated with a combination of Losec and antibiotics. Use all medications as directed by your doctor. Read the medication guide or patient instructions provided with each medication. Do not change your doses or medication schedule without your doctor's advice. Take Losec for the full prescribed length of time. Your symptoms may improve before the infection is completely cleared.

Prilosec OTC (over-the-counter) should be taken for no longer than 14 days in a row. Allow at least 4 months to pass before you start another 14-day treatment. You should not use this medicine if you are allergic to omeprazole or to any benzimidazole medicine such as albendazole or mebendazole. Heartburn is often confused with the first symptoms of a heart attack. Seek emergency medical attention if you have chest pain or heavy feeling, pain spreading to the arm or shoulder, nausea, sweating, and a general ill feeling.

How does Losec work?

Losec is a type of medicine called proton-pump inhibitor. It works by decreasing the production of acid in the stomach in order to provide relief for GERD symptoms and allow healing to take place. The decrease in the production of stomach acid does not stop food from being digested the normal way.

What are the benefits of taking Losec?

Losec is effective in decreasing the production of acid in the stomach. It results in the relief of symptoms and allow healing to take place.

Losec has been proven to be an effective treatment for different conditions characterized by too much acid in the stomach.

How do I use Losec?

Use Losec as instructed by your doctor. Read and understand the information leaflet that comes with the medication package.

Losec should be taken in the morning before meals.

You must swallow the capsule whole with half a glass of water. Do not chew or crush the capsule. The capsule contains coated pellets which stop the medicine from being broken down by the acid in the stomach. It is important not to damage the pellets.

If you or a child will have trouble swallowing the capsule, open the capsule and swallow the contents directly with half a glass of water. You may also put the contents into a glass of still water, acidic fruit juice such as orange juice, or apple sauce. Stir the mixture before drinking then rinse the glass with a half a glass of water and drink it. Chew the solid pieces that contain the medicine. Do not crush or chew the solid pieces.

If you forget to take Losec as scheduled in the morning, take it as soon as you remember. But if it is almost time before your next dose, just skip the missed dose and proceed with the next dose.

Do not stop taking the medication without consulting with your doctor.

Losec dosage

The Losec dose for an adult is usually 20 mg a day. Your doctor may prescribe a dose that vary from 10 mg to 40 mg a day depending on the condition you are being treated for. The dose will also depend on the severity of your condition.

For children 1 year or older, the dose of Losec is 10 mg a day for body weight of between 10 and 20 kg. The dose may be increased to 20 mg if deemed necessary by the doctor. For children whose body weight is more than 20 kg the dose is 20 mg a day. The dose may be increased to 40 mg when necessary.

Side effects & precautions

All medicines can result in some unwanted side effects. Sometimes, the side effects are serious but most of the time they are mild. Some side effects may require medical treatment.

The following are some mild side effects of Losec:

  • Constipation
  • Diarrhea
  • Nausea or vomiting
  • Skin rash or itchy skin
  • A headache
  • Flatulence
  • Dizziness
  • Stomach pain
  • Dry or sore mouth

The following are some of the serious side effects of Losec:

  • “Pins and needles”
  • Muscle pain or weakness, joint pain
  • Mood changers, depression or confusion
  • Changes in sleep pattern
  • Increase in breast size among males
  • Blurred vision
  • Increased bruising
  • Blurred vision
  • Fever
  • Increased sweating
  • Hair loss tremor

These side effects are serious but rare. They may require medical treatment. See your doctor when you experience any of these symptoms.

The following are very serious side effects that require urgent medical assistance:

  • Shortness of breath or difficulty of breathing
  • Swelling of the face, mouth, lips, tongue or through resulting in difficulty of breathing
  • Blood in the urine
  • Ulcers, blisters, or bleeding of the eyes, mouth, lips, nose and genitals
  • Signs of liver inflammation such as yellowing of the eyes or skin, nausea, feeling of generally unwell, and loss of appetite

Immediately call emergency medical services if you experience any of these side effects.

Immediately tell your doctor if you observe anything that is making you feel unwell.


Do not take Losec if you are allergic to it or any other ingredients listed in the patient information leaflet.

Do not take Losec if you have an allergy to proton pump inhibitors.

Do not take Losec if you are taking a medicine that contains nelfinavir that is used for HIV infection.

Taking a proton pump inhibitor, such as Losec for over a period of more than a year may increase your risk of fracture in the spine, hip, or wrist. Inform your doctor if you have osteoporosis, or if you are taking corticosteroids that will increase your risk of osteoporosis.

You may need to stop your treatment with Losec if you get a rash on your skin, especially in areas exposed to the sun.

Consult your doctor before taking Losec if you are pregnant, think you might be pregnant, or if you planning to get pregnant.

Losec is passed into the breast milk but will not likely influence the nursing infant. Ask your doctor if it is safe for you take Losec while breastfeeding.

Inform your doctor about all the medicines you are currently taking or have just taken before you start taking Losec. Ask your doctor if any of the medicines you are taking will interact with Losec.

How do I buy Losec online?

You can safely buy Losec online at UK Meds. You will need to have first an online consultation with a medical doctor before your order of Losec will be supplied. The online consultation will ensure that Losec is the right medication for your medical condition.