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Q: My child's fever is rising again after receiving a fever-reducing injection and flu treatment. When can I give oral fever reducers?

  • Myeongchan Kim
  • 4 hours ago
  • 2 min read

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:

Hello. My child was recently diagnosed with the flu and had a severe fever. They received a fever-reducing injection and a flu treatment injection around 5 PM today. However, the fever is starting to spike again right now. When can I start giving them oral fever-reducing medication at home? Also, is it safe to administer the exact dosage recommended by the app? Thank you!


Answer:

It is completely understandable to be worried when your child's fever rises again even after starting flu treatment.


Current Situation Summary

Your child received a fever-reducing injection and an antiviral flu treatment injection at 5 PM, and the fever is currently going back up.


When to Give Oral Fever Reducers

You can safely administer an oral fever-reducing medication (such as acetaminophen or ibuprofen) at home 4 to 6 hours after the fever-reducing injection was given.

  • Since the injection was at 5 PM, you can give oral medication between 9 PM and 11 PM.

  • If your child is very uncomfortable and the fever continues to rise, you may start the oral medication as early as 4 hours after the injection.


Confirming the Dosage

You can use the exact dosage recommended by the app. However, please ensure you follow these safety guidelines:

  • Always check the concentration (mg/mL) on the medicine bottle's label, as formulations can vary.

  • Measure the exact amount using an oral dosing syringe or the included measuring cup (never use regular kitchen spoons).

  • Acetaminophen (Tylenol): Can be given every 4 to 6 hours, up to a maximum of 5 times in a 24-hour period.

  • Ibuprofen (Advil/Motrin): Can be given every 6 to 8 hours, up to a maximum of 4 times in a 24-hour period.


Warning Signs to Watch For

If you notice any of the following symptoms, please take your child to the Emergency Room for immediate evaluation, even if it is during the night:

  • Difficulty breathing (e.g., skin pulling in under the rib cage, flaring nostrils).

  • Extreme lethargy, limpness, or difficulty waking up.

  • No urine output for more than 8 hours.

  • Inability to keep fluids down due to continuous vomiting.


Expected Course After Flu Treatment

Even after receiving an antiviral injection, it is normal for the fever to fluctuate for the first 1 to 2 days. Symptoms generally begin to improve within 48 hours, and most children feel significantly better by the third day.


For tonight, administer the fever reducer at the appropriate time and help your child stay hydrated by offering small, frequent sips of water. If the high fever persists into tomorrow, please follow up with the doctor or clinic that provided the initial treatment.



For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.








 
 
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