Q: My 4-year-old has a 40°C fever. I gave 6ml of medicine at 5 PM but the fever isn't dropping. Can I give an additional dose now?
Updated: Sep 7
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 4-year-old child (14.5 kg) has a high fever of 40°C. I gave them 6 ml of a fever reducer at 5:00 PM, which was less than the full dose because we ran out. The fever still hasn't gone down. I am currently wiping them with lukewarm water, and someone is on their way home with more medicine. Is it okay to administer an additional dose right now?
Answer:
I understand you must be very anxious with your child experiencing such a persistent high fever.
[Immediate Danger Signs]
First, please check your child's overall condition. If your child is having difficulty breathing (e.g., chest retractions, flaring nostrils), has bluish lips, is unusually lethargic or unresponsive when called, or has not urinated for over 8 hours, please call 911 or go to the nearest emergency room immediately.
[Giving Additional Fever Reducer]
Whether you can give an additional dose right now depends entirely on the active ingredient of the medicine given at 5:00 PM:
Acetaminophen (e.g., Tylenol): If the 6 ml was acetaminophen, you can give the next dose after 4 hours have passed.
Ibuprofen / Dexibuprofen: If it was ibuprofen, you must wait at least 6 hours before giving the next dose.
If the new medicine you are buying contains a different active ingredient from the 5:00 PM dose, you can generally alternate medications with a 2 to 3-hour interval. However, because cross-dosing carries a high risk of confusion and accidental overdose, it is highly recommended to stick to one type of medication at its proper time intervals.
[Stop Tepid Sponging]
Please stop wiping your child with lukewarm water. Physical cooling methods can cause the child to shiver, which generates heat and can actually raise their core body temperature. Instead, it is much more effective to dress your child in a single layer of light, breathable clothing, maintain a comfortably cool room temperature, and encourage them to take small, frequent sips of water to stay hydrated.
[When to See a Doctor]
Please visit an urgent care center or emergency room today if you notice any of the following:
Difficulty breathing
Extreme lethargy or weak response when you call their name
No urination for more than 8 hours
The high fever lasts for 3 or more days or worsens
The fever is accompanied by a stiff neck, severe headache, or vomiting
Because I cannot verify the exact medications you are using, please check the active ingredients carefully before administering any further doses to ensure you are following the correct time intervals. If you remain unsure about the dosing schedule, or if the high fever persists despite medication, please consult your pediatrician or visit a local urgent care clinic for a proper in-person evaluation.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
