Influenza (flu) vaccine, four strains, inactivated
Influenza vaccine, four strains, inactivated is a vaccine found in 1 medicine sold in India, such as Influvac Tetra. Below: what it is for, how it works, how to take it, side effects, interactions and pregnancy advice.
Also called: flu vaccine, influenza vaccine, flu shot
What it is used for
Lowers the chance of flu and its complications; strains are updated every year, so it is given yearly.
How it works
An inactivated four-strain flu vaccine, updated every year to match circulating strains.
How to take it
One injection every year, ideally before the flu season (in India often April to June and before winter).
Common side effects
- Sore arm
- Mild fever
- Aches for a day
Get medical help straight away if
- Allergic reaction
- Rarely weakness of legs in following weeks (Guillain-Barré)
Be careful
Recommended especially for older people, pregnant women, young children and people with long-term illness. Not for people with a severe allergy to a previous dose.
Other medicines and interactions
No important interactions.
Pregnancy and breastfeeding
Recommended in any trimester of pregnancy; protects the baby too. Safe while breastfeeding.
Brands of Influenza vaccine, four strains, inactivated (1)
Common questions
What is Influenza vaccine, four strains, inactivated used for?
Lowers the chance of flu and its complications; strains are updated every year, so it is given yearly.
How does Influenza vaccine, four strains, inactivated work?
An inactivated four-strain flu vaccine, updated every year to match circulating strains.
How should I take Influenza vaccine, four strains, inactivated?
One injection every year, ideally before the flu season (in India often April to June and before winter).
What are the side effects of Influenza vaccine, four strains, inactivated?
Common: Sore arm, mild fever, aches for a day. Get help straight away for: Allergic reaction, rarely weakness of legs in following weeks (Guillain-Barré).
Does Influenza vaccine, four strains, inactivated interact with other medicines?
No important interactions.
Is Influenza vaccine, four strains, inactivated safe in pregnancy and breastfeeding?
Recommended in any trimester of pregnancy; protects the baby too. Safe while breastfeeding.
Does Influenza vaccine, four strains, inactivated need a prescription in India?
Yes. In India it is a prescription (Schedule H) medicine, so a pharmacist should sell it only with a doctor's prescription.
Which brands contain Influenza vaccine, four strains, inactivated?
Influvac Tetra.
Sources and further reading
- Influenza (flu) vaccine, four strains, inactivated: NHS · MedlinePlus
NHS (UK National Health Service) and MedlinePlus (US National Library of Medicine) are free, reviewed medicine guides. Brand names and doses there may differ from India.
Last reviewed 31 October 2026. Written by Satya Babu from standard prescribing information.
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