Hi Sir. My Son Aged 7 Weighted 20 Has Fixed

Hi sir. My son aged 7 weighted 20 has Fixed Drug Allergy for certain medicines ie ciprofloxocin, brufen,diclofenac,ofloxacin as per reports. But the rashes at the fixed areas persists even after the use of Paracetamol like P 250, Crocin etc. So we are using Meftal P for him for each time when he gets fever. 1)Is it safe to use Meftal P Syrup continuously?
2)Is Meftal P suggestible even for normal fever with temperature around 100 to 102 F?
3) What is dosage of Meftal P suggestible to my son?
Please clarify my questions with your answers.
Thanks.