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Pfizer-BioNTech COVID-19 (6m-4y) Vaccine PF Side Effects

Generic name: sars-cov-2 mrna (tozinameran 6m-4y) vaccine

Note: This document contains side effect information about sars-cov-2 mrna (tozinameran 6m-4y) vaccine. Some dosage forms listed on this page may not apply to the brand name Pfizer-BioNTech COVID-19 (6m-4y) Vaccine PF.

Applies to sars-cov-2 mrna (tozinameran 6m-4y) vaccine: intramuscular suspension.


The most commonly reported side effects included injection site pain, fatigue, and headache.[Ref]


Very rare (less than 0.01%): Myocarditis, pericarditis[Ref]


Uncommon (0.1% to 1%): Hyperhidrosis, night sweats, rash, pruritus, urticaria

Frequency not reported: Angioedema, erythema multiforme[Ref]


Very common (10% or more): Diarrhea (up to 10%)

Common (1% to 10%): Nausea, vomiting[Ref]


Frequency not reported: Heavy menstrual bleeding[Ref]


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


Uncommon (0.1% to 1%): Hypersensitivity reactions

Frequency not reported: Anaphylaxis, facial swelling[Ref]


Very common (10% or more): Injection site pain (up to 90%), injection site redness (up to 20%), injection site swelling (up to 20%), injection site tenderness (up to 20%)

Frequency not reported: Excessive swelling of vaccinated limb, injection site pruritus[Ref]


Very common (10% or more): Decreased appetite (up to 30%)[Ref]


Very common (10% or more): Myalgia (up to 40%), arthralgia (up to 20%)

Uncommon (0.1% to 1%): Extremity pain[Ref]

Nervous system

Very common (10% or more): Headache (up to 70%), drowsiness (up to 40%)

Uncommon (0.1% to 1%): Dizziness, lethargy

Rare (0.01% to 0.1%): Acute peripheral facial paralysis/palsy

Frequency not reported: Hypoesthesia, paresthesia[Ref]


Very common (10% or more): Fatigue (up to 70%), chills (up to 40%), fever/pyrexia (up to 20%)

Frequency not reported: Asthenia, malaise[Ref]


Very common (10% or more): Irritability (up to 60%)

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

More about Pfizer-BioNTech COVID-19 (6m-4y) Vaccine PF (sars-cov-2 mrna (tozinameran 6m-4y) vaccine)


1. Product Information. Comirnaty Children 6 months - 4 years (SARS-CoV-2 mRNA (tozinameran 6m-4y) vaccine). Pfizer Ltd. 2022.

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.