Influvac Composition – Inactivated influenza vaccine (NA)
Manufactured By – Abbott
Prescription – Prescription Required
Form – Tablet
Price – Rs 890
Quantity – 0.5 ml in 1 prefilled syringe

What is Influvac?

  • Influvac is an inactivated influenza virus vaccine based on isolated surface antigens of A and B strains of myxovirus influenza.
  • It is indicated for prevention of influenza infection caused by specific strains present in vaccine.
  • It is specially recommended for people at greater risk of complications of influenza virus like elderly over 65 years, patients who have weak immune system.

Manufactured By – Abbott

Uses of Influvac

It is prescribed for:

  • Influenza

How does Influvac work?

  • The vaccination of antigen prepared from inactivated influenza virus stimulates the production of specific antibodies.
  • The vaccine causes the body to produce its own antibodies against three different types of influenza virus. These antibodies protect the body against the infection.

How to take Influvac

  • Influvac is administered by intramuscular or deep subcutaneous injection, whereas the intramuscular route is preferred.
  • Influvac medicine may be given at the same time as other vaccines. In such a case, immunization should be carried out in separate limbs.

Common Dosage of Influvac

  • Single 0.5ml dose of Influvac for patients previously exposed to viruses of similar antigenic composition to the strain(s) present in the vaccine.
  • Patients having impairment of immune mechanisms, two doses separated by an interval of at least four weeks are recommended.
  • Dose for adults and children over 3 years of age is 0.5 mL.
  • Children from 6 months- 35 months – 0.25ml dose is recommended. Safety and efficacy has not been established for children less than 6 months.

When to avoid Influvac

  • Avoid using Influvac if you are allergic to it or any other ingredient present in it or to eggs or chickenprotein, formaldehyde.
  • Avoid this medicine if you had anaphylaxis following a previous dose of any influenza vaccine.
  • Immunization with Influvac should be postponed in the presence of any acute illness,including acute or unstable neurologic illness, febrile illness, or active infection.

Drug interactions to be careful about

Influenza vaccine can impair the metabolism of:

  • Warfarin
  • Theophylline
  • Phenytoin
  • Phenobarbitone
  • Carbamazepine

Precautions when taking Influvac

  • Influvac should be administered subcutaneously in patients with thrombocytopenia or a bleeding disorder, since bleeding may occur following an intramuscular injection.
  • Patients with impaired immune responsiveness, may have a reduced antibody response in active immunization procedures.
  • It should not be mixed with other vaccines in the same syringe.
  • Use of this medicine in children under the age of 3, is not yet recommended.

Side Effects of Influvac

  • Headache
  • Fever
  • Malaise
  • Weakness
  • Allergic reactions around injection site.
  • Neuralgia, paraesthesia (rarely)

Reported allergic reactions

Symptoms of allergic reactions:

  • Hives
  • RashShortness of breath
  • Difficulty in breathing
  • Swelling on face, throat or hands. 

Effect on organs

  • Hematological reactions- Transient thrombocytopenia, transient lymphadenopathy.
  • Immune system reactions- Allergic reactions, in rare cases leading to shock, angioedema.
  • Nervous system reactions- Neuralgia, paresthesia, febrile convulsions, neurological disorders, such as encephalomyelitis, neuritis and Guillain Barre Syndrome.
  • Vascular reactions- Vasculitis associated in very rare cases with transient renal involvement.
  • Dermatological reactions- Generalized skin reactions including pruritus, Urticaria or non-specific rash.

Shows effects

  • The influenza vaccine, Influvac stimulates production of antibodies with a specific capacity against influenza.
  • It gives protection only against those strains of the virus from which the vaccine is prepared or closely related strains.


  • Keep it in an air-tight container.
  • Keep it away from direct light or moisture.
  • Keep it out of reach of children.

Pro Tips

  • Influvac vaccine should be administered before the beginning of the influenza season.
  • This vaccination should be repeated every year with an age appropriate doseof vaccine of updated antigen composition.
  • Influvac should not be administered intravenously and should not be mixed with other injection fluids.


Is Influvac addictive?


Can I have Influvac with alcohol?

Ask your doctor.

Any particular food item to be avoided?

No; not until your doctor tells you otherwise.

Can I have Influvac when pregnant?

Yes it can be administered in all three trimesters of pregnancy.

Can I have Influvac when feeding a baby?

yes it is safe to use while lactation.

Can I drive after taking Influvac?


What happens if I overdose on Influvac?

Probability of overdose is negligible if taken the given mode of administration into consideration.

What happens if I eat expired Influvac?

Expired drug may become ineffective in treating your prescribed conditions, thus to be on the safe side, it is important not to use expired drug.

What happens if I miss a dose of Influvac?

If you miss a dose of Influvac, skip it and continue with your normal schedule. Do not double dose for a missed one.

👋CashKaro Exclusive Offer👋

Hungry for more Cashback 💸? Download CashKaro App to get a Rs 60 bonus Cashback + Save up to Rs 15,000/month on online shopping.


Please enter your comment!
Please enter your name here

8 + one =