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Comvax Side Effects

Generic Name: haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine

Note: This document contains side effect information about haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine. Some of the dosage forms listed on this page may not apply to the brand name Comvax.

Applies to haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine: intramuscular suspension

Along with its needed effects, haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor or nurse immediately if any of the following side effects occur while taking haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine:

More common
  • Fever more than 103 degrees F
Less common
  • Body aches or pain
  • chills
  • cough
  • difficulty with breathing
  • ear congestion
  • fever
  • headache
  • loss of voice
  • nasal congestion
  • runny nose
  • sneezing
  • sore throat
  • unusual tiredness or weakness
Incidence not known
  • Black, tarry stools
  • bleeding gums
  • blistering, peeling, or loosening of the skin
  • blood in the urine or stools
  • convulsions
  • diarrhea
  • difficulty with swallowing
  • dizziness
  • fast heartbeat
  • hives
  • itching
  • joint or muscle pain
  • large, hive-like swelling on the face, eyelids, lips, tongue, throat, hands, legs, feet, or sex organs
  • pinpoint red spots on the skin
  • puffiness or swelling of the eyelids or around the eyes, face, lips, or tongue
  • red, irritated eyes
  • shortness of breath
  • skin rash
  • sores, ulcers, or white spots in the mouth or on the lips
  • tightness in the chest
  • unusual bleeding or bruising
  • wheezing

Some side effects of haemophilus b conjugate (prp-omp) vaccine / hepatitis b pediatric vaccine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common
  • Hard lumps, pain, redness, soreness, swelling, or warmth at the injection site
  • irritability
  • sleepiness or unusual drowsiness
  • unusual, high-pitched crying
Less common
  • Earache
  • loss of appetite
  • redness or swelling in the ear
  • vomiting
  • weight loss
Rare
  • Sore mouth or tongue
  • white patches in the mouth or throat or on the tongue
  • white patches with diaper rash
Incidence not known
  • Hives or welts
  • redness of the skin

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.

Medical Disclaimer

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