Hi Sir My Son Is Suffering From Fiver Since Two

Hi sir my son is suffering from fiver since two days. Local doctor gave him half of dolo650 in regular intervals of 4 hrs his weight is 33kg. Still fiver is not control it is not below base line even after 2 hrs. We consult a peditrician he gave same medicine along with meftal p syrup to take 6 ml with dolo half of 650 mg. Can we take it together.