Flublok (generic: influenza vaccine) is a prescription medication used to protect people from the influenza virus, also known as "the flu."
Flublok belongs to a group of drugs called vaccines, that work by strengthening the immune system to better protect itself.
This medication comes in injectable form, that is administered by a doctor, nurse or pharmacist.
Some common side effects are: fatigue, muscle ache, and pain at the injection site.
Flublok is a prescription medication used to protect people from the influenza virus, also known as "the flu."
This medication may be prescribed for other uses. Ask your doctor or pharmacist for more information.
The most common side effect from Flublok is pain at the site of the injection.
Other side effects include:
- fatigue (tiredness)
- muscle ache
This is not a complete list of Flublok side effects. Ask your healthcare provider for more information.
Do not receive Flublok if you have ever had a severe allergic reaction to a flu shot.
Tell your healthcare provider if you have ever had a serious allergic reaction to a previous flu shot.
Tell the doctor if you have ever experienced Guillain-Barrè syndrome (severe muscle weakness) within 6 weeks of a previous dose flu shot.
Tell your healthcare provider if you are pregnant or plan to become pregnant. Flublok has been studied in animals and showed no evidence of harm to the fetus, however, no studies have been performed in pregnant women. Because the safety and effectiveness of Flublok have not been established in pregnant women, you will need to discuss the risks of this vaccine with your healthcare provider.
The CDC warns that pregnant women are more likely to suffer severe complications related to influenza infection than women who are not pregnant. Additionally, there is a greater risk of premature labor and delivery in pregnant women with influenza.
Women who receive Flublok while pregnant should be registered in the pregnancy registry by calling 1-888-855-7871.
Prior to the availability of Flublok, other seasonal flu vaccines have been given safely to millions of pregnant women over many years. Flu shots have not been shown to cause harm to pregnant women or their babies.
Tell your healthcare provider if you are breastfeeding. Flublok has not been studied in breastfeeding mothers. It is not known if Flublok is excreted in human milk or if it will harm your nursing baby.
Flublok is given as a single dose (0.5 ml) by intramuscular (IM) injection into the upper arm.