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XOFLUZA is a one-dose prescription flu medication taken within the first 48 hours of symptoms for appropriate patients

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ACT FAST! The first 48 hours are critical to fighting the flu with one-dose XOFLUZA

The CDC recommends treating the flu with a prescription medication within the first 48 hours of experiencing symptoms.*

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Patients aged 12 years and older can feel better in just over 2 days

Without prescription medication, flu symptoms can last up to a week. Patients aged ≥12 years taking one-dose XOFLUZA felt better in an average of 2.3 days versus 3.3 days with placebo.

Patients aged 5 to less than 12 years can feel better in just over 5.5 days

One-dose XOFLUZA can also be given to otherwise healthy patients aged 5 to less than 12 years within 48 hours of experiencing flu symptoms.

One dose XOFLUZA® (baloxavir marboxil)

XOFLUZA works with just one dose

XOFLUZA treats the flu with one tablet taken one time.

One-dose XOFLUZA tablet size

XOFLUZA® (baloxavir marboxil) Tablet Size

Over-the-counter medicines just treat flu symptoms, but prescription one-dose XOFLUZA attacks the flu virus at its source.

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XOFLUZA is a safe flu medication

In clinical trials, side effects for patients aged 12 years and older on XOFLUZA were similar to or lower than placebo. The most common side effects are bronchitis, nausea, diarrhea, sinusitis, and headache.

In clinical trials, the most common side effects for patients aged 5 to less than 12 years on XOFLUZA were vomiting and diarrhea.

One-dose XOFLUZA can help prevent you from getting the flu

XOFLUZA helps protect you and your family members aged 5 years and older from getting the flu. XOFLUZA helps lower your chances of getting the flu by 87% after being exposed to someone who has the flu, compared with placebo. If a family member 5 years of age and older has been exposed to the flu, you need to act fast because the window for treatment is short.

*Source: Centers for Disease Control and Prevention (CDC). The CDC does not endorse private products, services, or enterprises. The content provided is for informational purposes only. Find the latest at
On average, patients aged ≥12 years felt better in 2.3 days vs 3.3 days with placebo.
On average, patients aged 5 to <12 years felt better in 5.75 days vs 5.25 days with oseltamivir.

Important Safety Information & Indication

What is XOFLUZA?

XOFLUZA is a prescription medicine used to:

  • treat the flu (influenza) in people who have flu symptoms for no more than 48 hours and who are:
    • otherwise healthy adults and children 5 years of age and older, or
    • adults and children 12 years of age and older who are at high risk of developing problems from the flu.
  • prevent the flu in people 5 years of age and older following contact with a person who has the flu (post-exposure prophylaxis).

XOFLUZA does not treat or prevent illness that is caused by infections other than the influenza virus.


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


It is not known if XOFLUZA is safe and effective for the treatment and prevention of the flu in children less than 5 years of age. XOFLUZA is not for use in children less than 5 years of age.

Important Safety Information

Who should not take XOFLUZA?

  • Do not take XOFLUZA if you are allergic to baloxavir marboxil or any of the ingredients in XOFLUZA.


What should I tell my healthcare provider before using XOFLUZA?

  • Tell your healthcare provider about all of your medical conditions, including if you are:
    • Pregnant or plan to become pregnant. It is not known if XOFLUZA can harm your unborn baby.
    • Breastfeeding or plan to breastfeed. It is not known if XOFLUZA passes into your breast milk.
  • Talk to your healthcare provider before you receive a live flu vaccine after taking XOFLUZA.
  • Tell your healthcare provider about all of the medicines you take, including prescription and over-the-counter medicines, antacids, laxatives, vitamins, and herbal supplements.

What are the possible side effects of XOFLUZA?
Serious side effects may include

  • Allergic reaction. Get emergency medical help right away if you develop any of the following signs or symptoms of an allergic reaction:
    • trouble breathing
    • skin rash, hives or blisters
    • swelling of your face, throat or mouth
    • dizziness or lightheadedness

The most common side effects of XOFLUZA for treatment of the flu in adults and adolescents (12 years of age and older) were diarrhea, bronchitis, nausea, sinusitis, and headache.


The most common side effects of XOFLUZA for treatment of the flu in children (5 years of age to less than 12 years of age) were diarrhea and vomiting.  


These are not all the possible side effects of XOFLUZA. Call your healthcare provider for medical advice about side effects.

XOFLUZA is not effective in treating or preventing infections other than influenza. Other kinds of infections can have symptoms like those of the flu or occur along with flu and may need different kinds of treatment. Tell your healthcare provider if you feel worse or develop new symptoms during or after treatment with XOFLUZA or if your flu symptoms do not start to get better.

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

Please see full Prescribing Information, including Patient Product Information.