Baloxavir Marboxil : Uses, Side Effects, Interactions & More

Why is this medication prescribed?
Baloxavir marboxil is used to treat some types of influenza (‘flu’) infection in adults and children 12 years of age and older who weigh at least 40 kg (88 pounds) and have had flu symptoms for no more than 2 days and who are otherwise healthy or at high risk of developing influenza-related complications. Baloxavir marboxil belongs to a class of medications called acidic endonuclease polymerase inhibitors. It works by stopping the spread of the flu virus in the body. Baloxavir marboxil helps to shorten the time that flu symptoms last, such as a runny or runny nose, sore throat, cough, muscle or joint pain, tiredness, headache, fever, and chills. Baloxavir marboxil does not prevent bacterial infections, which can occur as a complication of the flu.

How should this medicine be used?
Baloxavir marboxil comes as a tablet to take by mouth. It is usually taken as a single dose with or without food. Follow the directions on your prescription label carefully and ask your doctor or pharmacist to explain any part you do not understand. Take baloxavir marboxil exactly as directed. Do not take more or less than your doctor has prescribed.

Do not take baloxavir marboxil together with dairy products such as milk or yogurt or with calcium fortified beverages.

If you feel worse or develop new symptoms while taking baloxavir marboxil or if the flu symptoms do not start to improve, call your doctor.

Ask your pharmacist or doctor for a copy of the manufacturer’s information for the patient.

Other uses for this medicine
This medication may be prescribed for other uses; Ask your doctor or pharmacist for more information.

Before taking baloxavir marboxil,

  • Tell your doctor and pharmacist if you are allergic to baloxavir marboxil, any other medications, or any of the ingredients in baloxavir marboxil tablets. Ask your pharmacist for a list of the ingredients.
  • Tell your doctor and pharmacist what other prescription and over-the-counter medications, vitamins, nutritional supplements, you are taking or plan to take. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
  • Do not take antacids or laxatives that contain magnesium, aluminum, or calcium, calcium supplements, iron products, or vitamin or mineral supplements that contain calcium, iron, zinc, or selenium with baloxavir marboxil.
  • Tell your doctor if you are pregnant or breastfeeding.
  • Tell your doctor if you have recently received or are planning to receive a vaccine.

What special dietary instructions should I follow?
Unless your doctor tells you otherwise, continue your normal diet.

What side effects can this medication cause?

Some side effects with baloxavir marboxil can be serious. If you experience any of these symptoms, call your doctor immediately or get emergency medical treatment:

  • difficulty breathing or swelling of the face or throat
  • swelling of the arms, hands, feet, and legs
  • hives or itching
  • new red skin lesion or bump

Baloxavir marboxil may cause other side effects. Call your doctor if you have any unusual problems while taking this medicine.

If you experience a serious side effect, you or your doctor can submit a report online to the Food and Drug Administration (FDA) MedWatch Adverse Event Reporting Program ( or by phone (1-800-332-1088).

What should I know about storage and disposal of this medication?
Keep this medicine in its container, tightly closed and out of the reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom).

It is important to keep all medications out of the sight and reach of children, as many containers (such as those for taking pills weekly and those used for eye drops, creams, patches, and inhalers) are not resistant to children and children. young children can easily open them. To protect young children from poisoning, always close the safety caps and immediately put the medicine in a safe place, one that is up and away and out of your sight and reach.

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Unnecessary medications must be disposed of in special ways to ensure that pets, children, and others cannot consume them. However, you should not flush this medicine down the toilet. Instead, the best way to get rid of your medication is through a medication take-back program. Talk to your pharmacist or contact your local recycling / garbage department to find out about return programs in your community. Consult the FDA’s Safe Drug Disposal website ( for more information if you do not have access to a take-back program.

In case of emergency/overdose
In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at If the victim collapsed, had a seizure, is having trouble breathing, or cannot wake up, call 911 immediately.

What other information should I know?
Keep all your appointments with your doctor.

Do not let anyone else take your medicine.

It is important that you keep a written list of all prescription and over-the-counter (non-prescription) medications you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should carry this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in emergencies.

Brand Names

  • Xofluza

Disclaimer: DrLinex has made every effort to ensure that all information is factually accurate, comprehensive and up-to-date. However, this article should not be used as a licensed health care professional’s choice of knowledge and expertise. You should always consult your doctor or other health care professional before taking any medication. The information given here is subject to change and it has not been used to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions or adverse effects. The lack of warning or other information for any drug does not indicate that the combination of medicine or medication is safe, effective or appropriate for all patients or all specific uses.

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