Comvax Side Effects
Generic name: haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine
Medically reviewed by Drugs.com. Last updated on Feb 19, 2025.
Note: This document provides detailed information about Comvax Side Effects associated with haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine. Some dosage forms listed on this page may not apply specifically to the brand name Comvax.
Applies to haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine: intramuscular suspension.
Important warnings
This medicine can cause some serious health issues
Your child should not receive a booster vaccine if he or she had a life-threatening allergic reaction after the first shot.
Get emergency medical help if your child has signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
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 shot caused any side effects.
Becoming infected with influenza or hepatitis is much more dangerous to your child's health than receiving this vaccine. 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 your child has:
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high fever (within a few hours or a few days after the vaccine);
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seizure (blackout-out or convulsions); or
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fussiness, irritability, crying for an hour or longer.
Common side effects may include:
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mild fussiness or crying;
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drowsiness; or
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redness, pain, tenderness, swelling, 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.
More about Comvax (haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine)
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Further information
Comvax side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.