Q: Can my child get a flu shot after receiving a dexamethasone injection for tonsillitis?
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
My child recently had a fever of 38°C (100.4°F) and was diagnosed with tonsillitis. They received an injection to help reduce the fever, which I found out was dexamethasone. Since dexamethasone is a steroid, I am unsure if it is safe for them to get the flu vaccine right now. It has been two days since the injection. My child currently has no fever, is in good overall condition, and is not taking any medication. Is it okay to get the flu shot tomorrow? The vaccination keeps getting delayed because my child always seems to have a lingering cold.
Answer:
It is completely understandable to be concerned about the timing of the flu vaccine after treating tonsillitis. It is a relief to hear that it has been two days since the dexamethasone injection and your child is currently fever-free and feeling well.
Can my child get the flu vaccine?
Dexamethasone is a short-acting steroid. If 48 hours have passed since the injection and your child is currently symptom-free, it is generally safe to proceed with the flu vaccination.
Checklist before vaccination:
Current body temperature is normal (under 37.5°C or 99.5°F).
No severe acute symptoms like heavy coughing or excessive nasal congestion.
Your child is as active and playful as usual.
Appetite and general energy levels are back to normal.
Determining the right timing:
Proceed tomorrow: If your child has been fever-free and in good condition for over 48 hours, you can go ahead with the vaccination.
Wait a few more days: If your child still seems fatigued or has a decreased appetite, it is best to delay it slightly.
Because it is flu season, getting vaccinated is highly important. Mild cold symptoms (like a slight runny nose or an occasional cough) do not require you to delay the vaccine. You only need to postpone the shot if your child has a high fever or significant systemic symptoms.
Precautions after vaccination:
A mild fever and slight redness or swelling at the injection site are normal reactions.
Ensure your child gets plenty of rest and stays well-hydrated.
If a high fever develops and persists after the vaccination, please revisit your doctor for an evaluation.
Rather than continuously delaying the vaccine due to minor sniffles, it is better to get it done while your child is in good health. Please evaluate your child's condition one more time tomorrow morning, and consult with your pediatrician at the clinic before proceeding with the shot!
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
