Why does fever recur 5 hours after taking ibuprofen, and what should I do?

Normally, ibuprofen is available in various dosage forms including tablets, capsules, and granules. Antipyretic refers to fever reduction. Recurrent fever five hours after taking ibuprofen to reduce fever may be caused by factors such as chilling, improper diet, uncontrolled infection, drug interactions, insufficient dosage, or incorrect dosing intervals. If discomfort occurs, timely medical attention is recommended. Detailed explanations are as follows:

1. Body Chill

After taking ibuprofen, if the patient's physical condition hasn't fully recovered and is then exposed to cold, it may lead to chills and recurring fever. In this case, the patient should take measures to keep warm, such as wearing more clothing and avoiding direct exposure to cold winds, which helps prevent recurring fever.

2. Improper Diet

During the antipyretic period, consuming excessive spicy, greasy, or irritating foods might irritate the gastrointestinal mucosa, causing infections or food accumulation, which may lead to recurring fever. Patients are advised to maintain a light diet and consume easily digestible foods rich in nutrition while having a fever.

3. Uncontrolled Infection

If the source of infection isn't effectively controlled, fever may recur within several hours even after temporary reduction with medication. Medical examination should be conducted promptly to identify the cause and receive treatment under a doctor's guidance.

4. Drug Interactions

When multiple medications are used simultaneously, interactions between drugs might occur, altering drug metabolism, absorption, or excretion, thereby reducing efficacy or increasing side effects. The medication regimen should be adjusted under medical guidance to avoid drug interactions, and drugs potentially affecting ibuprofen's effectiveness should be discontinued if necessary.

5. Insufficient Dosage or Improper Dosing Intervals

The dosage and dosing intervals of ibuprofen should be determined according to medical advice. If the dosage is too low or the dosing intervals are too short, the drug may not effectively reduce body temperature. Patients should follow doctors' instructions to ensure proper medication use.

During illness, attention should be paid to body warmth, maintaining a light diet, and ensuring sufficient sleep, all of which help in body recovery.