Medically reviewed on September 5, 2018
Uses of Flublok:
- It is used to prevent the flu.
What do I need to tell my doctor BEFORE I take Flublok?
- If you have an allergy to Flublok (influenza virus vaccine (recombinant)) or any part of Flublok (influenza virus vaccine (recombinant)).
- If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.
This medicine may interact with other drugs or health problems.
Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take Flublok (influenza virus vaccine (recombinant)) with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.
What are some things I need to know or do while I take Flublok?
- Tell all of your health care providers that you take Flublok (influenza virus vaccine (recombinant)). This includes your doctors, nurses, pharmacists, and dentists.
- This medicine may not protect all people who use it. Talk with the doctor.
- This medicine is a vaccine made with proteins that cannot cause the flu.
- This medicine is not a cure for the flu. It must be given before you are exposed to the flu in order to work. Most of the time, it takes a few weeks for Flublok (influenza virus vaccine (recombinant)) to work.
- This medicine only protects you for 1 flu season. You will need to get the flu vaccine each year.
- Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using Flublok (influenza virus vaccine (recombinant)) while you are pregnant.
- Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.
How is this medicine (Flublok) best taken?
Use Flublok (influenza virus vaccine (recombinant)) as ordered by your doctor. Read all information given to you. Follow all instructions closely.
- It is given as a shot into a muscle.
What do I do if I miss a dose?
- Call your doctor to find out what to do.
See also: Dosage Information (in more detail)
What are some side effects that I need to call my doctor about right away?
WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:
- Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
What are some other side effects of Flublok?
All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:
- Pain where the shot was given.
- Irritation where the shot is given.
- Muscle or joint pain.
- Feeling tired or weak.
- Upset stomach.
- Mild fever.
These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.
You may report side effects to the FDA at 1-800-FDA-1088. You may also report side effects at http://www.fda.gov/medwatch.
See also: Side effects (in more detail)
If OVERDOSE is suspected:
If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
How do I store and/or throw out Flublok?
- If you need to store Flublok (influenza virus vaccine (recombinant)) at home, talk with your doctor, nurse, or pharmacist about how to store it.
Consumer information use
- If your symptoms or health problems do not get better or if they become worse, call your doctor.
- Do not share your drugs with others and do not take anyone else's drugs.
- Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.
- Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.
- Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.
- Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.
- Some drugs may have another patient information leaflet. Check with your pharmacist. If you have any questions about Flublok (influenza virus vaccine (recombinant)), please talk with your doctor, nurse, pharmacist, or other health care provider.
- If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.
Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
More about Flublok (influenza virus vaccine, inactivated)
- Flublok Side Effects
- During Pregnancy
- Dosage Information
- Drug Interactions
- Pricing & Coupons
- En Español
- Drug class: viral vaccines
- Flublok Quadrivalent 2018-2019 injection
- Flublok (Advanced Reading)
- Flublok 2016-2017 Formula (Advanced Reading)
- Flublok 2017-2018 Formula (Advanced Reading)