From BNF for children Post-immunisation pyrexia in infants (see also Post-immunisation pyrexia in infants)
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Paracetamol by mouth
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Child 2–3 months 60 mg as a single dose repeated once after 4–6 hours if necessary(dose can be repeated twice for meningococcal B vaccine)Child 4 months 60 mg as a single dose repeated after 4–6 hours (max. 4 doses in 24 hours)
- Ibuprofen by mouth (if needed)
- Child 50 mg as a single dose repeated once after 6 hours if necessary
Interesting read http://www.nhs.uk/news/2009/10october/pages/paracetamol-vaccine-injection-research.aspx