You can give another dose of ibuprofen (Rofinac) now, but if the fever persists or your relative shows any signs of worsening, take them to the hospital immediately.
Immediate Management
Since 10 hours have passed since the last ibuprofen suppository, you are safe to administer another dose now 1. The minimum interval between ibuprofen doses is 6-8 hours, and you've exceeded this timeframe. However, paracetamol's failure to control the fever after multiple doses over 36 hours is concerning and warrants close monitoring.
Why Ibuprofen May Work Better
Ibuprofen appears to have superior antipyretic efficacy compared to paracetamol in many clinical situations 2, 3. Research consistently shows that:
- Ibuprofen at 10 mg/kg provides better fever reduction than paracetamol at standard doses, particularly at the 4-6 hour mark 2, 4
- The fact that ibuprofen provided relief earlier (10 hours ago) while paracetamol has failed suggests an inflammatory component to the fever where NSAIDs are more effective
- Ibuprofen's anti-inflammatory properties make it particularly effective when fever has an inflammatory etiology 5
Dosing Strategy Going Forward
For the next 24 hours, consider using ibuprofen as your primary antipyretic:
- Give ibuprofen every 6-8 hours (maximum 3 doses per 24 hours) 1
- You may continue paracetamol between ibuprofen doses if needed, maintaining at least 2 hours between different medications 6, 7
- Carefully document all dose times to avoid exceeding maximum daily limits 8
Red Flags Requiring Immediate Hospital Evaluation
Take your relative to the hospital NOW if any of these develop:
- Fever remains >39°C despite ibuprofen after 2-4 hours
- New symptoms appear: confusion, severe headache, stiff neck, difficulty breathing, chest pain, persistent vomiting
- Signs of dehydration: decreased urination, dry mouth, lethargy
- Rash develops (especially with fever)
- The person appears significantly more ill or lethargic
- Fever persists beyond 3 days total 9, 1
Important Cautions
Do not exceed maximum doses 1:
- Paracetamol: maximum 6 doses in 24 hours (not exceeding 4000 mg for adults)
- Ibuprofen: maximum 3 doses in 24 hours
Avoid ibuprofen if your relative has 5:
- Dehydration (encourage fluid intake first)
- Known kidney problems
- Active stomach ulcers or gastrointestinal bleeding
- Severe asthma
The Underlying Issue
The key concern here is why paracetamol is completely ineffective. While ibuprofen often outperforms paracetamol for fever reduction 2, 10, 3, complete failure of multiple paracetamol doses suggests either:
- A predominantly inflammatory fever (where NSAIDs excel)
- A more serious underlying infection requiring medical evaluation
- Inadequate dosing of paracetamol (though 5 doses over 36 hours should be adequate)
If the ibuprofen dose you give now doesn't bring the fever down to <38°C within 4 hours, or if fever returns quickly after initial reduction, seek medical evaluation 11, 12. Persistent high fever despite appropriate antipyretic therapy warrants investigation for serious bacterial infections, including pneumonia, urinary tract infection, or other conditions requiring antibiotics 13.
The 36-hour duration of fever, while not automatically requiring hospitalization, is approaching the threshold where medical evaluation becomes prudent, especially given the poor response to paracetamol 9, 1.