Government of New Brunswick

Government of New Brunswick


H1N1 Vaccine - Possible Side Effects

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What can you expect after getting the pandemic H1N1 influenza vaccine?

  • Redness, discomfort, and swelling at the injection site that may last for a few days.
  • Fever, fatigue and muscle aches that may last for up to two days.
  • As is the case with any vaccine, there is an extremely small chance that a more serious reaction can occur.

Persons are asked to remain on site for at least 15 minutes after the vaccine is given so that possible reactions can be monitored.

What can you do if you get a reaction to the pandemic H1N1 influenza vaccine?

  • A cold compress on the injection site may reduce discomfort.
  • You may take or give your child acetaminophen or ibuprofen (e.g., Tylenol or Advil) for discomfort and fever. Aspirin (ASA) should NOT be given to children younger than 18 due to its link to Reye’s Syndrome
  • Seek medical advice at once if you or your child experiences a more serious reaction including breathing difficulties, seizure or loss of consciousness.

Report any serious side effects that occur in the four weeks following immunization to your local Public Health Office.

For more information, you may contact:

  • Your immunization provider
  • Tele-Care at 1-800-580-0038
  • Or visit the Government of New Brunswick website at www.gnb.ca/flu