Age groups
Antiviral agent	One to six years	Seven to nine years	10 to 12 years	13 to 64 years	65 years and older
Amantadine*
Treatment, influenza A	5 mg per kg per day up to 150 mg in two divided doses†	5 mg per kg per day up to 150 mg in two divided doses†	100 mg twice daily‡	100 mg twice daily‡	100 mg or less per day
Prophylaxis, influenza A	5 mg per kg per day up to 150 mg in two divided doses†	5 mg per kg per day up to 150 mg in two divided doses†	100 mg twice daily‡	100 mg twice daily‡	100 mg or less per day
Rimantadine§
Treatment∥, influenza A	NA	NA	NA	100 mg twice daily‡¶	100 mg per day#
Prophylaxis, influenza A	5 mg per kg per day up to 150 mg in two divided doses†	5 mg per kg per day up to 150 mg in two divided doses†	100 mg twice daily‡	100 mg twice daily‡	100 mg per day#
Zanamivir**††
Treatment, influenza A and B	NA	10 mg twice daily	10 mg twice daily	10 mg twice daily	10 mg twice daily
Oseltamivir
Treatment‡‡, influenza A and B	Dose varies by child's weight§§	Dose varies by child's weight§§	Dose varies by child's weight§§	75 mg twice daily	75 mg twice daily
Prophylaxis, influenza A and B	NA	NA	NA	75 mg per day	75 mg per day