Pediatric antiviral dosing calculator
Start here to choose the right antiviral medication page for pediatrics. This hub is a directory (no dosing tables).
Important safety note
Browse by infection type
Flu (influenza)
Influenza
Oseltamivir (Tamiflu) page with the weight-band calculator and safety notes.
HSV (herpes simplex)
Herpes simplex
Acyclovir page for HSV dosing. Valacyclovir is listed below for older children.
Varicella & zoster
Varicella / shingles
Valacyclovir page for chickenpox and shingles. Acyclovir is the other option.
Browse by medication
Oseltamivir
Influenza
Influenza antiviral page with pediatric calculator support and safety notes.
Acyclovir
HSV / varicella
Antiviral reference used for HSV and varicella in selected clinical scenarios.
Valacyclovir
HSV / zoster
Antiviral reference used for HSV and zoster in selected age groups and scenarios.
Safety notes
- Confirm the diagnosis and whether antiviral therapy is appropriate for the scenario.
- Check age cutoffs, renal considerations, and interactions on the medication page and in local guidance.
- Avoid duplicate therapy when caregivers are using combination products or multiple prescriptions.
- For infants, immunocompromised patients, or severe disease, use institutional pathways and specialist guidance.
Related tools
FAQs
No. This is a chooser page. Open the linked medication pages to use the dose calculator and review pediatric safety notes.
It depends on the infection, timing, age, and risk factors. Use the infection list on this page to find typical options, then review the medication page and local guidance.
Use the medication-specific pages linked on this hub. They include pediatric guidance and dose calculator support when available.
Seek urgent evaluation for infants with fever, severe or rapidly worsening illness, dehydration, altered mental status, breathing difficulty, or concern for immunocompromise. Follow local pathways and clinician guidance.