Hepatitis A vaccine is used to prevent infections caused by hepatitis A virus.
Hepatitis A is a liver infection caused by a virus that spreads through contact with the stool (poop) of an infected person.
Hepatitis A vaccine is given by intramuscular (into the muscle) injection.
A doctor or nurse will administer the injection for you.
Ensure that you keep all appointments with your doctor so that you do not miss any doses. Your doctor also needs to regularly monitor your response to Hepatitis A vaccine.
If you miss an appointment or miss an injection, alert your doctor or nurse. A replacement appointment or injection should be given as soon as possible.
Do not use this vaccine if you ever had an allergic reaction (rashes, breathlessness, swollen eyes) to Hepatitis A vaccine.
Inform your doctor if you have the following conditions:
- a very weak immune system
- moderate or severe illness with or without fever
- bleeding disorders
- liver disease
Let your doctor know if you are pregnant or breastfeeding.
Keep your appointments with your doctor. Your doctor may need to monitor your liver function.
Hepatitis A vaccine may cause any of the following side effects: tiredness, weakness, irritability, difficulty sleeping, headache, conjunctivitis, nausea, vomiting, diarrhoea, constipation, stomach discomfort or pain, loss of appetite, muscle or joint stiffness or pain, fever, runny nose, sore throat, cough and injection site reactions including redness, pain or swelling.
Some side effects may need immediate medical help. Alert your doctor quickly if you experience signs and symptoms of allergic reaction e.g. rashes, difficulty breathing, swelling of the face, mouth, lips, tongue, or throat.
Inform the doctor if any of these side effects do not go away or are severe, or if you experience other side effects.
Inform your doctor and pharmacist if you are taking any of these medicines:
- medicines used in organ transplant or certain immune disorders e.g. ciclosporin, tacrolimus, methotrexate, azathioprine
- high-dose anti-inflammatory medicines e.g. prednisone
This list does not include all medicines that may interact with Hepatitis A vaccine.
Always notify the doctor and pharmacist if you are taking any other medicines, including herbal tonics such as traditional Chinese medicines, supplements and medicines that you buy without a prescription.
Store in the refrigerator. Do not allow to freeze. If frozen, this medicine will become ineffective and should not be used.
Protect from light. Light may cause the medication to lose some of its effectiveness.
Medicines must not be used past the expiry date.