• Keep this leaflet. You may need to read it again.
• If you have any further questions, ask your doctor or pharmacist.
• This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours.
• If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.

1. What Omeprazole tablets are and what they are used for
2. What you need to know before you take Omeprazole tablets
3. How to take Omeprazole tablets
4. Possible side effects
5. How to store Omeprazole tablets
6. Contents of the pack and other information

• If you are allergic to omeprazole or any of the other ingredients of Omeprazole tablets.
• If you are allergic to medicines containing other proton pump inhibitors (e.g. pantoprazole, lansoprazole, rabeprazole, esomeprazole).
• If you are taking a medicine containing nelfinavir (used for HIV infection).

Do not take Omeprazole tablets if any of the above apply to you. If you are not sure, talk to your doctor or pharmacist before taking Omeprazole tablets.

Talk to your doctor or pharmacist before taking Omeprazole tablets.

Serious skin reactions including Stevens-Johnson syndrome, toxic epidermal necrolysis, drug reaction with eosinophilia and systemic symptoms (DRESS) and acute generalized exanthematous pustulosis (AGEP) have been reported in association with Omeprazole tablets treatment. Stop using Omeprazole tablets and seek medical attention immediately if you notice any of the symptoms related to these serious skin reactions described in section 4.

Omeprazole tablets may hide the symptoms of other diseases. Therefore, if any of the following happen to you before you start taking Omeprazole tablets or while you are taking it, talk to your doctor straight away:

• You lose a lot of weight for no reason and have problems swallowing.
• You get stomach pain or indigestion.
• You begin to vomit food or blood.
• You pass black stools (blood-stained faeces).
• You experience severe or persistent diarrhoea, as omeprazole has been associated with a small increase in infectious diarrhoea.
• You have severe liver problems.
• You have ever had a skin reaction after treatment with a medicine similar to Omeprazole tablets that reduces stomach acid.
• You are due to have a specific blood test (Chromogranin A).

If you take Omeprazole tablets on long term basis (longer than 1 year) your doctor will probably keep you under regular surveillance. You should report any new and exceptional symptoms and circumstances whenever you see your doctor.

Taking a proton pump inhibitor like Omeprazole tablets, especially over a period of more than one year, may slightly increase your risk of fracture in the hip, wrist or spine. Tell your doctor if you have osteoporosis or if you are taking corticosteroids (which can increase the risk of osteoporosis).

If you get a rash on your skin, especially in areas exposed to the sun tell your doctor as soon as you can, as you may need to stop your treatment with Omeprazole tablets. Remember to also mention any other ill-effects like pain in your joints.

When taking omeprazole, inflammation in your kidneys may occur. Signs and symptoms may include decreased volume of urine or blood in your urine and/or hypersensitivity reactions such as fever, rash, and joint stiffness. You should report such signs to your doctor.

This medicine may affect the way that your body absorbs vitamin B12, particularly if you need to take it for a long time. Please contact your doctor if you notice any of the following symptoms, which could indicate low levels of Vitamin B12:

• Extreme tiredness or lack of energy
• Pins and needles
• Sore or red tongue, mouth ulcers
• Muscle weakness
• Disturbed vision
• Problems with memory, confusion, depression

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines. This includes medicines that you buy without a prescription. This is because Omeprazole tablets can affect the way some medicines work and some medicines can have an effect on Omeprazole tablets.

Do not take Omeprazole tablets if you are taking a medicine containing nelfinavir (used to treat HIV infection).

Tell your doctor or pharmacist if you are taking any of the following medicines:

• Ketoconazole, itraconazole, posaconazole or voriconazole (used to treat infections caused by a fungus)
• Digoxin (used to treat heart problems)
• Diazepam (used to treat anxiety, relax muscles or in epilepsy)
• Phenytoin (used in epilepsy). If you are taking phenytoin, your doctor will need to monitor you when you start or stop taking Omeprazole tablets
• Medicines that are used to thin your blood, such as warfarin or other vitamin K blockers. Your doctor may need to monitor you when you start or stop taking Omeprazole tablets
• Rifampicin (used to treat tuberculosis)
• Atazanavir (used to treat HIV infection)
• Tacrolimus (in cases of organ transplantation)
• St John’s wort (Hypericum perforatum) (used to treat mild depression)
• Cilostazol (used to treat intermittent claudication)
• Saquinavir (used to treat HIV infection)
• Clopidogrel (used to prevent blood clots (thrombi))
• Erlotinib (used to treat cancer)
• Methotrexate (a chemotherapy medicine used in high doses to treat cancer) - if you are taking a high dose of methotrexate, your doctor may temporarily stop your Omeprazole tablets treatment

If your doctor has prescribed the antibiotics amoxicillin and clarithromycin as well as Omeprazole tablets to treat ulcers caused by Helicobacter pylori infection, it is very important that you tell your doctor about any other medicines you are taking.

See section 3.

If you are pregnant or breast-feeding, think you may be pregnant or are planning to have a baby, ask your doctor or pharmacist for advice before taking this medicine.

Omeprazole is excreted in breast milk but is not likely to influence the child when therapeutic doses are used.

Your doctor will decide whether you can take Omeprazole tablets if you are breast-feeding.

Omeprazole tablets is not likely to affect your ability to drive or use any tools or machines. Side effects such as dizziness and visual disturbances may occur (see section 4). If affected, you should not drive or operate machinery.

Omeprazole tablets contain lactose. If you have been told by your doctor that you have an intolerance to some sugars, contact your doctor before taking this medicinal product.

Omeprazole tablets contain less than 1 mmol sodium (23 mg) per tablet, that is to say essentially ‘sodium-free’.

To treat symptoms of GORD such as heartburn and acid regurgitation:

• If your doctor has found that your food pipe (gullet) has been slightly damaged, the recommended dose is 20 mg once a day for 4-8 weeks. Your doctor may tell you to take a dose of 40 mg for a further 8 weeks if your gullet has not yet healed.
• The recommended dose once the gullet has healed is 10 mg once a day.
• If your gullet has not been damaged, the usual dose is 10 mg once a day.

To treat ulcers in the upper part of the intestine (duodenal ulcer):

• The recommended dose is 20 mg once a day for 2 weeks. Your doctor may tell you to take the same dose for a further 2 weeks if your ulcer has not yet healed.
• If the ulcers do not fully heal, the dose can be increased to 40 mg once a day for 4 weeks.

To treat ulcers in the stomach (gastric ulcer):

• The recommended dose is 20 mg once a day for 4 weeks. Your doctor may tell you to take the same dose for a further 4 weeks if your ulcer has not yet healed.
• If the ulcers do not fully heal, the dose can be increased to 40 mg once a day for 8 weeks.

To prevent the duodenal and stomach ulcers from coming back:

• The recommended dose is 10 mg or 20 mg once a day. Your doctor may increase the dose to 40 mg once a day.

To treat duodenal and stomach ulcers caused by NSAIDs (Non-Steroidal Anti-Inflammatory Drugs):

• The recommended dose is 20 mg once a day for 4–8 weeks.

To prevent duodenal and stomach ulcers if you are taking NSAIDs:

• The recommended dose is 20 mg once a day.

To treat ulcers caused by Helicobacter pylori infection and to stop them coming back:

• The recommended dose is 20 mg Omeprazole tablets twice a day for one week.
• Your doctor will also tell you to take two antibiotics among amoxicillin, clarithromycin and metronidazole.

To treat too much acid in the stomach caused by a growth in the pancreas (Zollinger-Ellison syndrome):

• The recommended dose is 60 mg daily.
• Your doctor will adjust the dose depending on your needs and will also decide how long you need to take the medicine for.

This formulation is not suitable for children.

• It is recommended that you take your tablets in the morning.
• You can take your tablets with food or on an empty stomach.
• Swallow your tablets whole with half a glass of water. Do not chew or crush the tablets. This is because the tablets are coated with enteric coating which stops the medicine from being broken down by the acid in your stomach. It is important not to damage the tablets

If you take more Omeprazole tablets than prescribed by your doctor, talk to your doctor or pharmacist straight away.

If you forget to take a dose, take it as soon as you remember it. However, if it is almost time for your next dose, skip the missed dose. Do not take a double dose to make up for a forgotten dose.

If you stop taking Omeprazole tablets

Do not stop taking Omeprazole tablets without first talking to your doctor or pharmacist.

Common side effects (may affect up to 1 in 10 people)

• Headache.
• Effects on your stomach or gut: diarrhoea, stomach pain, constipation, wind (flatulence).
• Feeling sick (nausea) or being sick (vomiting).
• Benign polyps in the stomach.

Uncommon side effects (may affect up to 1 in 100 people)

• Swelling of the feet and ankles.
• Disturbed sleep (insomnia).
• Dizziness, tingling feelings such as “pins and needles”, feeling sleepy.
• Spinning feeling (vertigo).
• Changes in blood tests that check how the liver is working.
• Skin rash, lumpy rash (hives) and itchy skin.
• Generally feeling unwell and lacking energy.
• Fractures of the hip, wrist or spine.

Rare side effects (may affect up to 1 in 1,000 people)

• Blood problems such as a reduced number of white cells or platelets. This can cause weakness, bruising or make infections more likely.
• Low levels of sodium in the blood. This may cause weakness, being sick (vomiting) and cramps.
• Feeling agitated, confused or depressed.
• Taste changes.
• Eyesight problems such as blurred vision.
• Suddenly feeling wheezy or short of breath (bronchospasm).
• Dry mouth.
• An inflammation of the inside of the mouth.
• An infection called "thrush" which can affect the gut and is caused by a fungus.
• Hair loss (alopecia).
• Skin rash on exposure to sunshine.
• Joint pains (arthralgia) or muscle pains (myalgia).
• Severe kidney problems (interstitial nephritis).
• Increased sweating.

Very rare side effects (may affect up to 1 in 10,000 people)

• Changes in blood count including agranulocytosis (lack of white blood cells).
• Aggression.
• Seeing, feeling or hearing things that are not there (hallucinations).
• Severe liver problems leading to liver failure and inflammation of the brain.
• Erythema multiforme.
• Muscle weakness.
• Enlarged breasts in men.

Not known (frequency cannot be estimated from the available data)

• Inflammation in the gut (leading to diarrhoea).
• If you are on Omeprazole Capsules for more than three months it is possible that the levels of magnesium in your blood may fall. Low levels of magnesium can be seen as fatigue, involuntary muscle contractions, disorientation, convulsions, dizziness or increased heart rate. If you get any of these symptoms, please tell your doctor promptly. Low levels of magnesium can also lead to a reduction in potassium or calcium levels in the blood. Your doctor may decide to perform regular blood tests to monitor your levels of magnesium.
• Rash, possibly with pain in the joints.

Omeprazole tablets may in very rare cases affect the white blood cells leading to immune deficiency.

If you have an infection with symptoms such as fever with a severely reduced general condition or fever with symptoms of a local infection such as pain in the neck, throat or mouth or difficulties in urinating, you must consult your doctor as soon as possible so that a lack of white blood cells (agranulocytosis) can be ruled out by a blood test. It is important for you to give information about your medicine at this time.

If you get any side effects, talk to your doctor or pharmacist. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme Website: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.

The active substance is omeprazole. Omeprazole tablets contain 10 mg, 20 mg and 40 mg of omeprazole.

The other ingredients are lactose monohydrate, sodium starch glycolate, sodium stearyl fumarate, sodium stearate, hypromellose acetate succinate, brownish pink colour [contains propylene glycol, titanium dioxide (E171), red iron oxide (E172), hypromellose and yellow iron oxide (E172)], talc, triethyl citrate, monoethanolamine, sodium laurilsulfate and traces of carnauba wax.

1. Omeprazole 10 mg gastro-resistant tablets are brownish-pink film coated capsule shaped tablets.

Blisters of 28 tablets

2. Omeprazole 20 mg gastro-resistant tablets are brownish-pink film coated capsule shaped tablets.

Blisters of 28 tablets

3. Omeprazole 40 mg gastro-resistant tablets are brownish-pink film coated capsule shaped tablets.

Blisters of 7, 28 tablets

Not all pack sizes may be marketed.