Skip to Content

Vaqta Pediatric Side Effects

Generic Name: hepatitis a pediatric vaccine

Note: This document contains side effect information about hepatitis a pediatric vaccine. Some of the dosage forms listed on this page may not apply to the brand name Vaqta Pediatric.

For the Consumer

Applies to hepatitis a pediatric vaccine: intramuscular suspension

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

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 shot caused any side effects.

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

Call your child's doctor at once if the child has:

  • extreme drowsiness, fainting;

  • fussiness, irritability, crying for an hour or longer;

  • seizure (blackout-out or convulsions); or

  • high fever (within a few hours or a few days after the vaccine).

Common side effects may include:

  • low fever, general ill feeling;

  • nausea, loss of appetite;

  • headache; or

  • swelling, tenderness, redness, warmth, 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.

For Healthcare Professionals

Applies to hepatitis a pediatric vaccine: intramuscular suspension


The most common adverse events were injection site reactions, irritability, drowsiness, loss of appetite and headache.[Ref]


Very common (10% or more): Injection site soreness (56%), injection site pain (37%), injection site redness (22.8%)
Common (1% to 10%): Induration and swelling of the injection site, injection site bruising, injection site ecchymosis
Uncommon (0.1% to 1%): Injection site hematoma
Postmarketing reports: Injection site reaction[Ref]

Nervous system

Very common (10% or more): Headache (23.8%), drowsiness (22.3%),
Uncommon (0.1% to 1%): Dysgeusia, hypertonia, vertigo, seizure
Rare (less than 0.1%): Febrile seizure
Postmarketing reports: Convulsion, dizziness, encephalopathy, Guillain-Barre syndrome, hypoesthesia, multiple sclerosis, myelitis, neuropathy, paresthesia, somnolence, syncope, cerebellar ataxia, encephalitis[Ref]


Very common (10% or more): Fever (16.4%)
Common (1% to 10%): Fatigue, malaise, crying
Uncommon (0.1% to 1%): Creatine phosphokinase increased
Postmarketing reports: Congenital anomaly, influenza-like symptoms[Ref]


Very common (10% or more): Irritability (33.3%)
Common (1% to 10%): Insomnia[Ref]


Very common (10% or more): Loss of appetite (19.9%)
Common (1% to 10%): Anorexia
Rare (less than 0.1%): Dehydration[Ref]


Common (1% to 10%): Upper respiratory tract infection, conjunctivitis, otitis media, nasopharyngitis, viral infection, pharyngitis streptococcal, laryngotracheobronchitis, viral exanthema, gastroenteritis viral, roseola, pharyngitis[Ref]


Common (1% to 10%): Nausea, diarrhea, teething, constipation, vomiting, abdominal pain
Rare (less than 0.1%): Gastroenteritis[Ref]


Common (1% to 10%): Dermatitis diaper, rash vesicular, measles-like rash, varicella-like rash, rash morbilliform
Uncommon (0.1% to 1%): Pruritus, rash, urticaria
Rare (less than 0.1%): Cellulitis
Postmarketing reports: Angioedema, erythema multiforme, hyperhidrosis[Ref]


Common (1% to 10%): Myalgia, back pain, stiffness
Uncommon (0.1% to 1%): Arthralgia
Postmarketing reports: Musculoskeletal stiffness, chills[Ref]


Uncommon (0.1% to 1%): Allergic reactions (including injection site pruritus/rash, bronchial constriction, asthma, wheezing, edema/swelling, rash, generalized erythema, urticaria, pruritus, eye irritation/itching, dermatitis)
Postmarketing reports: Anaphylactic reaction, anaphylactoid reaction, serum sickness-like syndrome[Ref]


Uncommon (0.1% to 1%): Lymphadenopathy
Postmarketing reports: Thrombocytopenia[Ref]


Postmarketing reports: Hepatitis, jaundice[Ref]


Postmarketing reports: Vasculitis[Ref]


Uncommon (0.1% to 1%): Photophobia[Ref]


Common (1% to 10%): Rhinorrhea, cough, nasal congestion, respiratory congestion
Postmarketing reports: Dyspnea[Ref]


1. "Product Information. Havrix (hepatitis A vaccine)." SmithKline Beecham, Philadelphia, PA.

2. "Product Information. Vaqta (hepatitis A vaccine)." Merck & Company Inc, West Point, PA.

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.

More about Vaqta Pediatric (hepatitis a pediatric vaccine)

Consumer resources

Other brands: Havrix Pediatric

Other Formulations

Related treatment guides