Very rare (these may occur with up to 1 in 10,000 doses of the vaccine):
• Temporary inflammation of the brain and nerves causing pain, weakness and paralysis that may
spread across the body.
• Narrowing or blockage of blood vessels with kidney problems
Rare (these may occur with up to 1 in 1,000 doses of the vaccine):
• Allergic reactions leading to a dangerous decrease of blood pressure, which, if untreated, may
lead to collapse, coma and death
• Fits
• Severe stabbing or throbbing pain along one or more nerves
• Low blood platelet count which can result in bleeding or bruising
Uncommon (these may occur with up to 1 in 100 doses of the vaccine):
• Generalised skin reactions including urticaria (hives)
If any of these side effects occur, please tell your doctor or pharmacist immediately.
The side effects listed below have occurred with Pandemrix in clinical studies:
Very common (these may occur with more than 1 in 10 doses of the vaccine):
• Headache
• Tiredness
• Pain, redness, swelling or a hard lump at the injection site
• Fever
• Aching muscles, joint pain
Common (these may occur with up to 1 in 10 doses of the vaccine):
• Warmth, itching or bruising at the injection site
• Increased sweating, shivering, flu-like symptoms
• Swollen glands in the neck, armpit or groin
Uncommon (these may occur with up to 1 in 100 doses of the vaccine):
• Tingling or numbness of the hands or feet
• Sleepiness
• Dizziness
• Diarrhoea, vomiting, stomach pain, feeling sick
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• Itching, rash
• Generally feeling unwell
• Sleeplessness
These reactions usually disappear within 1-2 days without treatment.
If any of the side effects gets serious, or if you notice any side effects not listed in this leaflet, please
tell your doctor or pharmacist.