The CDC has outlined specific antiviral guidelines for prevention and treatment of confirmed, probable, and suspected cases of patients with influenza A(H1N1) and their close contacts.
Current antiviral dosing recommendations are as follows:
oseltamivir (Tamiflu)
To prevent influenza A(H1N1).
Adults: 75 mg capsule by mouth (P.O.) once daily for 10 days
Children 12 months and older weighing greater than 40 kg: 75 mg P.O. once daily for 10 days
Children 12 months and older weighing 24 kg to 40 kg: 60 mg P.O. once daily for 10 days
Children 12 months and older weighing 16 kg to 23 kg: 45 mg P.O. once daily for 10 days
Children 12 months and older weighing 15 kg or less: 30 mg P.O. once daily for 10 days
Infants 6 to 11 months: 25 mg P.O. once daily for 10 days
Infants 3 to 5 months: 20 mg P.O. once daily for 10 days
Infants less than 3 months: Not recommended unless situation judged critical due to limited data on use in this age group.
To treat influenza A(H1N1).
Adults: 75 mg capsule P.O. twice daily for 5 days
Children 12 months and older weighing greater than 40 kg: 150 mg P.O. per day divided into two doses for 5 days
Children 12 months and older weighing 24 kg to 40 kg: 120 mg P.O. per day divided into two doses for 5 days
Children 12 months and older weighing 16 kg to 23 kg: 90 mg P.O. per day divided into two doses for 5 days
Children 12 months and older weighing 15 kg or less: 60 mg P.O. per day divided into two doses for 5 days
Infants 6 to 11 months: 25 mg P.O. twice daily for 5 days
Infants 3 to 5 months: 20 mg P.O. twice daily for 5 days
Infants less than 3 months: 12 mg P.O. twice daily for 5 days
Click here for complete prescribing information for oseltamivir (Tamiflu).
Click here for drug information from NDH2009
Click here for drug information from NDH2009
zanamivir (Relenza)
To prevent influenza A(H1N1)
Adults: Two 5 mg inhalations (10 mg total) once per day for 10 days
Children 5 years and older: Two 5 mg inhalations (10 mg total) once per day for 10 days
Adults: Two 5 mg inhalations (10 mg total) once per day for 10 days
Children 5 years and older: Two 5 mg inhalations (10 mg total) once per day for 10 days
To treat influenza A(H1N1)
Adults: Two 5 mg inhalations (10 mg total) twice per day for 5 days
Children 7 years and older: Two 5 mg inhalations (10 mg total) twice per day for 5 days
Click here for complete prescribing information for zanamivir (Relenza).
Click here for drug information from NDH2009.
Click here for drug information from NDH2009.
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