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Pronunciation |
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(he
MOF i lus bee KON joo gate &
hep a TYE tis bee vak SEEN) |
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U.S. Brand
Names |
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Comvax® |
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Synonyms |
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Haemophilus b (meningococcal
protein conjugate) Conjugate Vaccine; Hib |
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Pharmacological Index |
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Vaccine |
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Use |
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Immunization against invasive disease caused by H. influenzae type b
and against infection caused by all known subtypes of hepatitis B virus in
infants 8 weeks to 15 months of age born of HBsAg-negative mothers
Infants born of HBsAg-positive mothers or mothers of unknown
HBsAg status should receive hepatitis B immune globulin and hepatitis
B vaccine (Recombinant) at birth and should complete the hepatitis B vaccination
series given according to a particular schedule |
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Pregnancy Risk
Factor |
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C |
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Contraindications |
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Hypersensitivity to any component of the vaccine |
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Warnings/Precautions |
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If used in persons with malignancies or those receiving immunosuppressive
therapy or who are otherwise immunocompromised, the expected immune response may
not be obtained.
The decision to administer or delay vaccination because of current or recent
febrile illness depends on the severity of symptoms and the etiology of the
disease. Immunization should be delayed during the course of an acute febrile
illness. |
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Adverse
Reactions |
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When administered during the same visit that DTP, OPV, IPV, Varicella Virus
Vaccine, and M-M-R II vaccines are given, the rates of systemic reactions do not
differ from those observed only when any of the vaccines are administered
All serious adverse reactions must be reported to the U.S. Department of Health
and Human Services (DHHS) Vaccine Adverse Event Reporting System (VAERS)
1-800-822-7967.
1% to 10%:
Central nervous system: Fever (up to 102.2°F),
irritability, lethargy
Gastrointestinal: Anorexia, diarrhea
Local: Irritation at injection site
<1%: Convulsions, fever (>102.2°F), vomiting,
allergic or anaphylactic reactions (difficulty in breathing, hives, itching,
swelling of eyes, face, unusual tiredness or weakness) |
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Stability |
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Store at 2°C to
8°C/36°F to
48°F |
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Mechanism of
Action |
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Hib conjugate vaccines use covalent binding of capsular polysaccharide of
Haemophilus influenzae type b to OMPC carrier to produce an antigen which is
postulated to convert a T-independent antigen into a T-dependent antigen to
result in enhanced antibody response and on immunologic memory. Recombinant
hepatitis B vaccine is a noninfectious subunit viral vaccine. The vaccine is
derived from hepatitis B surface antigen (HBsAg) produced through
recombinant DNA techniques from yeast cells. The portion of the hepatitis B gene
which codes for HBsAg is cloned into yeast which is then cultured to
produce hepatitis B vaccine. |
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Pharmacodynamics/Kinetics |
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The seroconversion following one dose of Hib vaccine for children 18 months
or 24 months of age or older is 75% to 90% respectively
Onset of Hib serum antibody responses: 1-2 weeks after vaccination
Duration: Hib Immunity appears to last 1.5 years
Duration of action: Following all 3 doses of hepatitis B vaccine, immunity
will last ~5-7 years |
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Usual Dosage |
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Infants (>8 weeks of age): I.M.: 0.5 mL at 2, 4, and 12-15 months of age
(total of 3 doses)
Modified Schedule: Children who receive one dose of hepatitis B
vaccine at or shortly after birth may receive Comvax™ on
a schedule of 2,4, and 12-15 months of age |
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Patient
Information |
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May use acetaminophen for postdose fever |
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Nursing
Implications |
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Defer immunization if infection or febrile illness
present |
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Dosage Forms |
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Injection: 7.5 mcg Haemophilus b PRP and 5 mcg HBsAg/0.5
mL |
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