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Losec is and effective and established proton-pump inhibitor medication for the treatment of acid reflux. It is made by Astra-Zeneca and is a branded form of Omeprazole.

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What is Losec?

Losec is the branded version of Omeprazole. Omeprazole belongs to a group of drugs called proton pump inhibitors. It is used to treat symptoms of gastroesophageal reflux disease (GORD) and other conditions caused by excess stomach acid.

How does Losec work?

Losec works by decreasing the amount of acid produced in the stomach.

How to take?

Omeprazole is usually taken before eating. Follow all directions on your prescription label. Do not take this medicine in larger or smaller amounts or for longer than recommended.

Do not crush, chew, or break an omeprazole pill. Swallow the pill whole.

Common Side Effects

  • Headache
  • Effects on your stomach or gut: diarrhoea, stomach pain, flautulence, constipation
  • Feeling sick (nausea) or being sick (vomiting)

Read the patient information leaflet for a full list of side effects.


How long does Losec take to work?

Losec is a fast-acting acid reflux treatment. Some people notice it working after one dose. If symptoms do not start improving between five days, visit your GP to discuss alternative options.

How do I take Losec?

Take one Losec tablet every morning, 30 minutes before breakfast. Swallow with water.

What is the best time to take Losec?

The best time to take Losec is in the morning, 30 minutes before eating food.

What are the side effects of Losec?

Common side effects of Losec include headaches, nausea and stomach pains. Please see the ‘side effects’ tab for more information.

Can I take Losec with other heartburn medication?

You should not take other heartburn medication alongside Losec, unless it is an antacid. Antacids like Gaviscon can be taken with Losec, but please wait at least 2 hours between doses.

Can I take Losec when pregnant?

Losec is safe to take when pregnant.

Can I take Losec when breastfeeding?

Losec is safe to take when breastfeeding. However, if your baby has health concerns, speak to your doctor beforehand.

Can I drink alcohol when taking Losec?

You can drink alcohol when taking Losec, but please bear in mind that alcohol can worsen symptoms of acid reflux.

What is the difference between Losec and Omeprazole?

Losec is just the branded version of Omeprazole. It contains the active ingredient Omeprazole and works in the exact same way as generic Omeprazole.

What is the difference between Losec and Losec MUPS?

Standard Losec tablets are capsules that must be swallowed whole. Losec MUPS are dissolvable tablets that melt in the mouth. The MUPS version is ideal for those who have difficulty swallowing.

Can I buy Losec online?

You can buy Losec online through Express Pharmacy. You must complete our online assessment before purchasing, to see if you are suitable for the treatment.


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Patient Information

Before taking any medication, it is important to read the Patient Information Leaflet. You can find the information by searching for your treatment on Medicines.org.uk.

If you have any questions about your treatment please refer to Medicines.org.uk or contact us.

Losec Patient Information Leaflet

Latest product reviews from feefo


They work and do thei job

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Really helps to stop indigestion particularly in the current situation where zantac is not available for purchase.

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