Q: My 8-year-old's fever spiked to 39.3°C again after an Influenza A IV treatment. Is this normal?
- Myeongchan Kim
- May 31
- 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:
My 8-year-old child was diagnosed with Influenza A yesterday and immediately received an antiviral IV treatment. After the IV, my child sweated a lot last night, and their temperature dropped to 36.6°C. However, I just checked again, and the fever has spiked back up to 39.3°C. Is it normal for the temperature to fluctuate like this? Do we need to get another IV treatment? Also, before getting the IV, a different clinic had prescribed an oral antiviral medication. Should I give this oral medication to my child as well?
Answer:
It is completely understandable to be worried when your child's fever spikes again after an Influenza diagnosis. Here is a breakdown of what to expect and how to handle the situation.
Current Situation & Medications
Fever Fluctuations: With Influenza A, it is very common for a fever to fluctuate and go up and down for 1 to 2 days, even after administering an antiviral treatment (IV or oral).
Additional IV Treatment: Because your child received an antiviral IV yesterday, the medication is already actively working in their system. An additional IV treatment is generally not necessary.
Oral Antiviral Medication: The oral antiviral prescribed by the other clinic overlaps with the IV antiviral treatment. Typically, adding an oral antiviral after receiving an IV antiviral is unnecessary. However, you should contact the hospital that administered the IV to confirm whether you should give the oral medication, as medical judgments can vary.
What to Do at Home
Fever Management: If the 39.3°C fever is making your child uncomfortable, administer an appropriate fever reducer (acetaminophen or ibuprofen) dosed according to their weight.
Hydration & Environment: Offer water or electrolyte drinks frequently in small amounts. Dress your child in light clothing and keep the room at a cool, comfortable temperature.
Monitoring: Check their temperature every 4 to 6 hours. If your child is still drinking fluids and playing a bit, they are likely doing fine.
When to Seek Immediate Medical Care
Please contact your doctor or visit an urgent care center if you observe any of the following warning signs:
Difficulty breathing, or if the chest/area under the ribs pulls in with each breath.
Signs of severe dehydration, such as no urine for over 8 hours, dry lips, or no tears when crying.
Severe lethargy, difficulty waking up, or weak responses when called.
The fever lasts for more than 5 days, or drops completely and then severely spikes again.
For now, focus on providing fever reducers and keeping your child well-hydrated. Be sure to consult your pediatrician or visit a doctor immediately if any of the warning signs appear.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
