Havrix is a hepatitis A vaccine. Hepatitis is a serious disease caused by a virus. Hepatitis causes inflammation of the liver, vomiting, and jaundice (yellowing of the skin or eyes). Hepatitis can lead to liver cancer, cirrhosis, or death.
Hepatitis A is spread through contact with the stool (bowel movements) of a person infected with the hepatitis A virus. This usually occurs by eating food or drinking water that has become contaminated as a result of handling by an infected person.
Havrix is used to help prevent this disease in adults. The vaccine works by exposing you to a small amount of the virus, which causes the body to develop immunity to the disease. Havrix will not treat an active infection that has already developed in the body.
Vaccination with Havrix is recommended for all adults who travel in certain areas of the world where hepatitis A is a common disease.
Other risk factors for hepatitis include: being a homosexual male; having chronic liver disease; using intravenous (IV) drugs; receiving treatment for hemophilia or other bleeding disorders; working in a research laboratory or around animals (especially monkeys) where you may be exposed to the hepatitis A virus; or being in an area where there has been an outbreak of hepatitis A.
Like any vaccine, Havrix may not provide protection from disease in every person.
Important information
Havrix will not protect you against infection with hepatitis B, C, and E, or other viruses that affect the liver. It may also not protect you from hepatitis A if you are already infected with the virus, even if you do not yet show symptoms.
You will most likely receive 2 separate injections of the Havrix at 6 months apart, depending on your exposure or risk of infection. Children should receive their first Havrix between 12 months and 23 months of age.
Vaccination with Havrix adult vaccine is recommended for all adults who travel in certain areas of the world where hepatitis A is a common disease.
Other risk factors for hepatitis include: being a homosexual male; having chronic liver disease; using intravenous (IV) drugs; receiving treatment for hemophilia or other bleeding disorders; working in a research laboratory or around animals (especially monkeys) where you may be exposed to the hepatitis A virus; or being in an area where there has been an outbreak of hepatitis A.
Be sure you receive all recommended doses of Havrix. If you do not receive the full series of vaccines, you may not be fully protected against the disease.
You should not receive Havrix if you have ever had a life-threatening allergic reaction to any vaccine containing hepatitis A, or if you have received cancer chemotherapy or radiation treatment in the past 3 months.
You can still receive a vaccine if you have a cold or fever. In the case of a more severe illness with a fever or any type of infection, wait until you get better before receiving Havrix.
Becoming infected with hepatitis A is much more dangerous to your health than receiving the vaccine to protect against it. Like any medicine, Havrix can cause side effects, but the risk of serious side effects is extremely low.
Before receiving Havrix
Havrix will not protect you against infection with hepatitis B, C, and E, or other viruses that affect the liver. It may also not protect you from hepatitis A if you are already infected with the virus, even if you do not yet show symptoms.
You should not receive Havrix if you have ever had a life-threatening allergic reaction to any vaccine containing hepatitis A, or if you have received cancer chemotherapy or radiation treatment in the past 3 months.
If you have any of these other conditions, the administration of the Havrix vaccine may need to be postponed or not given at all:
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a bleeding or blood clotting disorder such as hemophilia or easy bruising;
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a history of seizures;
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a neurologic disorder or disease affecting the brain;
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an allergy to latex rubber;
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a weak immune system caused by disease, bone marrow transplant, or by using certain medicines or receiving cancer treatments; or
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if you are taking a blood thinner (warfarin, Coumadin).
You can still receive a vaccine if you have a minor cold. In the case of a more severe illness with a fever or any type of infection, wait until you get better before receiving Havrix.
Vaccines may be harmful to an unborn baby and generally should not be given to a pregnant woman. However, not vaccinating the mother could be more harmful to the baby if the mother becomes infected with a disease that Havrix could prevent. Your doctor will decide whether you should receive this vaccine, especially if you have a high risk of infection with hepatitis A.
It is not known if hepatitis A vaccine passes into breast milk or if it could harm a nursing baby. Tell your doctor if you are breast-feeding a baby.
How is Havrix given?
Havrix is injected into a muscle. You will receive this injection in a doctor"s office or clinic setting.
You will most likely receive 2 separate injections of Havrix at 6 months apart, depending on your exposure or risk of infection.
To prevent hepatitis A while traveling, you should receive the Havrix vaccine at least 2 weeks before your trip. Your healthcare provider will determine the best dosing schedule for your situation.
Your doctor may recommend treating fever and pain with an aspirin free pain reliever such as acetaminophen (Tylenol) or ibuprofen (Motrin, Advil, and others) when the shot is given and for the next 24 hours. Follow the label directions or your doctor"s instructions about how much of this medicine to use.
It is especially important to prevent fever from occurring if you have a seizure disorder such as epilepsy.
What happens if I miss a dose?
Contact your doctor if you miss a booster dose or if you get behind schedule. The next dose should be given as soon as possible. There is no need to start over.
Be sure to receive all recommended doses of Havrix. You may not be fully protected if you do not receive the full series.
What happens if I overdose?
An overdose of this vaccine is unlikely to occur.
What should I avoid?
Follow your doctor"s instructions about any restrictions on food, beverages, or activity.
Havrix side effects
Get emergency medical help if you have any of these signs of an allergic reaction to Havrix: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
You should not receive a booster vaccine if you had a life threatening allergic reaction after the first shot.
Keep track of any and all side effects you have after receiving the Havrix vaccine. When you receive a booster dose, you will need to tell the doctor if the previous shot caused any side effects.
Becoming infected with hepatitis A is much more dangerous to your health than receiving Havrix. However, like any medicine, this vaccine can cause side effects but the risk of serious side effects is extremely low.
Call your doctor at once if you have:
Common Havrix side effects include:
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low fever;
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headache;
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dizziness, tired feeling;
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nausea, vomiting, stomach pain, diarrhea, loss of appetite;
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joint pain;
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sore throat; or
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swelling, redness, or a hard lump where the shot was given.
This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report vaccine side effects to the US Department of Health and Human Services at 1-800-822-7967.
See also: Side effects (in more detail)
What other drugs will affect Havrix?
Before receiving Havrix, tell the doctor about all other vaccines you have recently received.
Also tell the doctor if you have recently received drugs or treatments that can weaken the immune system, including:
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an oral, nasal, inhaled, or injectable steroid medicine;
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medications to treat psoriasis, rheumatoid arthritis, or other autoimmune disorders; or
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medicines to treat or prevent organ transplant rejection.
If you are using any of these medications, you may not be able to receive the vaccine, or may need to wait until the other treatments are finished.
This list is not complete. Other drugs may interact with Havrix, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible interactions are listed in this medication guide.
