Dosage of Oseltamivir

For most adults and adolescents, the recommended starting dosage of oseltamivir is 75 mg, twice a day, for five days. Your specific dosage will depend on factors such as your age and any other medical conditions you may have. When the dosage of oseltamivir is taken as a preventive measure, the medication is generally taken once a day for at least 10 days.

 

Dosage of Oseltamivir: An Introduction

When selecting your dose of oseltamivir (Tamiflu®), your doctor will consider a number of factors, including:
 
  • Your age
  • Other medical conditions you may have.
     
As is the case with all medicines, do not adjust your dosage of oseltamivir unless specifically instructed by your healthcare provider to do so.
 

Dosage of Oseltamivir for Treating the Flu in Adults and Adolescents

The recommended starting dosage of oseltamivir for most adults and adolescents over the age of 13 is 75 mg, twice a day, for five days. Oseltamivir should be started within two days of first noticing flu symptoms.
 

Dosage of Oseltamivir for Preventing the Flu in Adults and Adolescents

Oseltamivir should be started as soon as one has been in close contact with someone who has the flu -- preferably within two days. The recommended dose for flu prevention in people age 13 or older is 75 mg, once a day, for at least 10 days. If there is a flu outbreak in your area, you can take 75 mg once a day for up to six weeks.
 

Dosage of Oseltamivir for Children

For the prevention or treatment of the flu in children 1 to 12 years of age, the recommended dosage of oseltamivir will be based on the weight of the child. Talk to your healthcare provider or pharmacist about the specific dosage for your child.
 
(Dosage of Oseltamivir Continued: Page 2)
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Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD;