Hi,my Son Is 3 Years And Nine Months Old,he Has

Hi,my son is 3 years and nine months old,he has for the second time got viral,i have given meftagesic ds 5ml,but even after more than one and half hours the fever isnt subsiding,as per his doctor i gave him 2.5ml crocin 120 ,at the time when i gave him meftagesic he had 98.5 according to armpit thermometer reading.his weight is 18kgs,what s the best medicine for kids to take care of the fever as soon as possible,i gave him meds around 11.15,just now it has started to reduce,what should i do pls help me