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Tamiflu is a prescription medicine used to treat the flu (influenza) in people 2 weeks of age and older who have had flu symptoms for no more than 2 days. Tamiflu can also reduce the chance of getting the flu in people 1 year and older.

Tamiflu does not prevent bacterial infections that may happen with the flu.

Tamiflu is not a substitute for an annual flu vaccination.

Do not take Tamiflu if you are allergic to oseltamivir phosphate or any of the ingredients in Tamiflu.

Important Safety Information

  • If you have an allergic reaction or a severe rash with Tamiflu, stop taking it, and contact your doctor right away. This may be very serious.
  • People with the flu, particularly children and adolescents, may be at an increased risk of seizure, confusion, or abnormal behavior early during their illness.
  • Let your doctor know if you are pregnant, nursing, have heart problems, breathing problems, a weakened immune system (immunocompromised), kidney problems or other medical conditions as Tamiflu may not be right for you.
  • Also tell your doctor about any medications you are taking or if you've received a nasal-spray flu vaccine in the past two weeks.
  • The most common side effects are mild to moderate nausea and vomiting, diarrhea and stomach pain.

Please see the Tamiflu full Prescription Information for complete important safety information.

You are encouraged to report side effects to Genentech by calling 1-888-835-2555 or to the FDA by visiting www.fda.gov/medwatch or calling 1-800-FDA-1088.