Like all medicines, this medicine can cause side effects, although not everybody gets them.
Common side effects (may affect up to 1 in 10 people)
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Headache.
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Effects on your stomach or gut: diarrhoea, stomach pain, constipation, wind (flatulence).
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Feeling sick (nausea) or being sick (vomiting).
Uncommon side effects (may affect up to 1 in 100 people)
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Swelling of the feet and ankles.
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Disturbed sleep (insomnia).
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Dizziness, tingling feelings such as “pins and needles”, and feeling sleepy.
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Spinning feeling (vertigo).
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Changes in blood tests that check how the liver is working.
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Skin rash, lumpy rash (hives), and itchy skin.
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Generally feeling unwell and lacking energy.
For a full list of side effects please read the Patient Information Leaflet.
If you notice any of the following rare but serious side effects, stop taking Losec and contact a doctor immediately:
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Sudden wheezing, swelling of your lips, tongue and throat or body, rash, fainting or difficulties in swallowing (severe allergic reaction).
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Reddening of the skin with blisters or peeling. There may also be severe blisters and bleeding in the lips, eyes, mouth, nose and genitals. This could be ‘Stevens-Johnson syndrome’ or ‘toxic epidermal necrolysis’.
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Yellow skin, dark urine and tiredness which can be symptoms of liver problems.
Losec 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.
Reporting of side effects
If you get any side effects, talk to your doctor or pharmacist.
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