Comvax

Comvax is a vaccine used to help prevent Haemophilus influenzae type b and against infection caused by all known subtypes of hepatitis B virus in infants 6 weeks to 15 months of age born of hepatitis B negative mothers.

Tell your doctor about all the medicines you take including prescription and nonprescription medicines, vitamins and herbal supplements. Especially tell your doctor if you take:

• medicines that weaken the immune system

This is not a complete list of Comvax drug interactions. Ask your doctor or pharmacist for more information. 

Comvax is a vaccine that is given as a shot into the thigh.

Infants born to hepatits B negative mothers should be vaccinated with three doses of Comvax, ideally at 2, 4, and 12-15 months of age. If the recommended schedule cannot be followed, the interval between the first two doses should be at least six weeks and the interval between the second and third dose should be as close as possible to eight to eleven months.

Contact your doctor if you will 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 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.

Follow your doctor's instructions about any restrictions on food, beverages, or activity after your child receives this vaccine.

Haemophilus b conjugate vaccine and hepatitis B vaccine is a combination immunizing agent that is used to prevent infection caused by the Haemophilus influenzae type b (Hib) bacteria and hepatitis B virus. The vaccine works by causing your body to produce its own protection (antibodies) against the disease.

Infections with Haemophilus influenza type b (Hib) bacteria can cause life-threatening illnesses, such as meningitis (a brain disease), epiglottitis (a throat disease that can cause suffocation), pericarditis (a heart disease), pneumonia (a lung disease), and septic arthritis (a bone and joint disease). Hib meningitis may cause death or leave the child with serious and permanent damage, such as mental retardation, deafness, epilepsy, or partial blindness.

HBV infection is a major cause of serious liver diseases, such as hepatitis and cirrhosis, and a type of liver cancer called primary hepatocellular carcinoma.

Pregnant women who have hepatitis B infection or are carriers of hepatitis B virus can give the disease to their babies when they are born. These babies often suffer serious long-term illnesses from the disease.

Immunization against hepatitis B disease is recommended for all newborn babies, infants, and young children.

This vaccine is to be administered only by or under the direct supervision of your doctor.

In deciding to use a vaccine, the risks of taking the vaccine must be weighed against the good it will do. This is a decision you and your doctor will make. For this vaccine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies have not been performed on the relationship of age to the effects of Comvax® vaccine in infants younger than 6 weeks and older than 15 months of age. Safety and efficacy have not been established.

Geriatric

Comvax® vaccine is not recommended for adult or geriatric patients.

Pregnancy

Breast Feeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Interactions with Medicines

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your healthcare professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine.

Interactions with Food/Tobacco/Alcohol

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. Discuss with your healthcare professional the use of your medicine with food, alcohol, or tobacco.

Other Medical Problems

The presence of other medical problems may affect the use of this vaccine. Make sure you tell your doctor if you have any other medical problems, especially:

• Allergy to yeast—Should not be used in patients with this condition.

• Bleeding problems (e.g., hemophilia, thrombocytopenia)—Use with caution. May have an increased risk of bleeding at the injection site.

• Severe illness with a fever—Your child's dose may need to be given at a later time.

• Weak immune system from a disease or medicine (e.g., those who are receiving a steroid, chemotherapy for cancer, or who have HIV infection)—May not work as well in patients with this condition.

A nurse or other trained health professional will give your child this vaccine. This vaccine is given as a shot into one of your child's muscles, usually in the thighs.

This vaccine is usually given as 3 doses. It is usually given at 2, 4, and 12 to 15 months of age, unless your child's doctor tells you otherwise.

It is important that your child receive all of the doses of vaccine in this series. Try to keep all of your scheduled appointments. If your child does miss a dose of this vaccine, make another appointment as soon as possible.

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your child's doctor or get medical help right away if your child has any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• High fever.

• If you need to store Comvax at home, talk with your child's doctor, nurse, or pharmacist about how to store it.
• Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
• Check with your pharmacist about how to throw out unused drugs.