Getting hepatitis A disease is much riskier than getting hepatitis A vaccine. However, a vaccine, like any medicine, is capable of causing serious problems, such as severe allergic reactions. The risk of hepatitis A vaccine causing serious harm, or death, is extremely small. Seek emergency medical attention or contact your doctor immediately if any of the following rare but serious side effects from hepatitis A vaccine are experienced:
a serious allergic reaction including swelling of the lips, tongue, or face; difficulty breathing; closing of the throat; hives; paleness; weakness; dizziness; or a fast heart beat within a few minutes to a few hours after the shot; ;
high fever; or ;
behavior changes. .
Other less serious side effects may be more likely to occur. Talk to your doctor if you experience:
mild to moderate fever; ;
loss of appetite; ;
fatigue; ;
headache; or ;
soreness where the shot was given, lasting a day or two. .
Your doctor may recommend reducing fever and pain by taking an aspirin-free pain reliever such as acetaminophen (Tylenol, Tempra, others) or ibuprofen (Motrin, Advil, others) when the shot is given and for the next 24 hours. Your healthcare provider can tell you the appropriate dosages of these medications.
Side effects other than those listed here may also occur. Contact your doctor about any side effect that seems unusual or that is especially bothersome.
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