Side effects vary between the different types of hepatitis A vaccine, but can include the following:
Very common (affecting more than 1 in 10 people at each dose):
- pain at the injection site
- redness and hardness at the injection site
- feeling tired, irritable, weak or generally unwell
- loss of appetite or feeling sick
- upset stomach or diarrhoea
Common (affecting up to 1 in 10 people at each dose):
- a slightly raised temperature (fever)
- swelling or a small lump at the injection site
- itchy skin
- aching muscles
- feeling drowsy
Uncommon (affecting up to 1 in 100 people at each dose):
- feeling dizzy
- stomach pain or being sick
For rarer side effects (affecting fewer than 1 in 1000 people), ask to see the Patient Information Leaflet for the vaccine you are offered.
As with any vaccine, medicine or food, there is a very small chance of a severe allergic reaction (anaphylaxis). Anaphylaxis is different from less severe allergic reactions because it causes life-threatening breathing and/or circulation problems. It is always extremely serious but can be treated with adrenaline. Health care workers who give vaccines know how to do this. In the UK between 1997 and 2003 there were a total of 130 reports of anaphylaxis following ALL immunisations. Around 117 million doses of vaccines were given in the UK during this period. This means that the overall rate of anaphylaxis is around 1 in 900,000.
More information on side effects
Reactions listed under ‘possible side effects’ or ‘adverse events’ on vaccine product information sheets may not all be directly linked to the vaccine. See Vaccine side effects and adverse reactions for more information on why this is the case.
If you are concerned about any reactions that occur after vaccination, consult your doctor. In the UK you can report suspected vaccine side effects to the Medicines and Healthcare products Regulatory Agency (MHRA) through the Yellow Card Scheme . You can also contact the MHRA to ask for data on Yellow Card reports for individual vaccines . See more information on the Yellow Card scheme and monitoring of vaccine safety.