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Enzira® (influenza vaccine)

What is Enzira® (Influenza Vaccines- split virion, inactivated) and what is it used for?

Enzira is a vaccine which helps to protect patients against influenza (flu). It is indicated in adults and children from 5 years of age, especially in those who run an increased risk of associated complications. 


How does the vaccine work?

The influenza vaccine contains small amounts of viral strains, which when injected, stimulate the immune system to produce antibodies in response to the virus which help to protect the individual against the disease. As this is an inactivated vaccine, none of the ingredients used in the vaccine are able to cause flu. Due to the presence of different viral strains, protection against flu is often not long term and, therefore, recommended that individuals receive an annual vaccination to ensure protection against the current circulating strains.


When should the vaccine be administered?

Enzira should be administered based on official recommendations. Enzira is able to be given at the same time as other vaccines if immunisation is carried out on separate limbs; however, it must be noted that this may intensify adverse reactions.

It must be noted that Enzira is marketed by Pfizer on behalf of Seqirus vaccines Ltd.

The medicine can only be obtained with a prescription.


Reference information
PP-ENZ-GBR-0045 / Oct 2017

Pfizer is unable to provide advice on personal medical matters. Please consult your doctor or other relevant health professionals for specific, health-related advice and support.

If you get any side effects when taking this or any other medicine, talk to your doctor or other relevant health professional e.g. pharmacist, nurse.. This includes any possible side effects not listed in the packaging leaflet. You can also report side effects directly via the Yellow Card Scheme at By reporting side effects, you can help provide more information on the safety of this medicine.