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Medications and Drugs

Brand Names: Comvax

Generic Name: haemophilus b and hepatitis B vaccine (Pronunciation: hem OFF il us B and HEP a TYE tis)

What is haemophilus B and hepatitis B vaccine (Comvax)?

Haemophilus B is a type of influenza (flu) caused by bacteria.

Haemophilus B bacteria can infect the lungs or throat, and can also spread to the blood, bones, joints, brain, or spinal cord. It can cause breathing problems or meningitis, and these infections can be fatal.

Hepatitis B is a serious disease caused by virus.

Hepatitis B is a disease of the liver that is spread through blood or bodily fluids, sexual contact or sharing IV drug needles with an infected person, or during childbirth when a baby is born to a mother who is infected. Hepatitis causes inflammation of the liver, vomiting, and jaundice (yellowing of the skin or eyes). Hepatitis can lead to liver cancer, cirrhosis, or death.

The haemophilus B and hepatitis B vaccine is used to help prevent these diseases in children.

This vaccine works by exposing your child to a small dose of the bacteria or virus, which causes the body to develop immunity to the disease. This vaccine will not treat an active infection that has already developed in the body.

Haemophilus B and hepatitis B vaccine is for use in children between the ages of 6 weeks and 15 months old.

Like any vaccine, the haemophilus B and hepatitis B vaccine may not provide protection from disease in every person.

What are the possible side effects of this vaccine (Comvax)?

Your child should not receive a booster vaccine if he or she had a life-threatening allergic reaction after the first shot.

Keep track of any and all side effects your child has after receiving this vaccine. When the child receives a booster dose, you will need to tell the doctor if the previous shots caused any side effects.

Becoming infected with haemophilus B or hepatitis A is much more dangerous to your child's health than receiving the vaccine to protect against these diseases. Like any medicine, this vaccine can cause side effects, but the risk of serious side effects is extremely low.

Get emergency medical help if your child has any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if the child has any of these serious side effects:

  • extreme drowsiness, fainting;
  • fussiness, irritability, crying for an hour or longer;
  • seizure (black-out or convulsions); or
  • high fever.

Less serious side effects include:

  • redness, pain, tenderness, swelling, or a hard lump where the shot was given;
  • diarrhea, loss of appetite, mild vomiting;
  • mild fussiness or crying;
  • joint pain, body aches; or
  • mild fever.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about this vaccine (Comvax)?

The haemophilus B and hepatitis B vaccine is given in a series of shots. The first shot is usually given when the child is 2 months old. Booster shots may be given at 4 months and 12 to 15 month of age. Your child's individual booster schedule may be different from these guidelines. Follow your doctor's instructions or the schedule recommended by the health department of the state you live in.

Be sure your child receives all recommended doses of this vaccine. If your child does not receive the full series of vaccines, he or she may not be fully protected against the disease.

Your child can still receive a vaccine if he or she has a cold or fever. In the case of a more severe illness with a fever or any type of infection, wait until the child gets better before receiving this vaccine.

Your child should not receive a booster vaccine if he or she had a life-threatening allergic reaction after the first shot.

Keep track of any and all side effects your child has after receiving this vaccine. When the child receives a booster dose, you will need to tell the doctor if the previous shots caused any side effects.

Becoming infected with haemophilus B or hepatitis A is much more dangerous to your child's health than receiving the vaccine to protect against these diseases. Like any medicine, this vaccine can cause side effects, but the risk of serious side effects is extremely low.



Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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