For controlling the temperature you can use paracetamol
6 hrly. If she still runs high temperature then you can use ibuprofen
or mefenemic acid. Never use too many antipyratics simultaneously.
Tepid water sponging of whole body is also a very good remedy to decrease the temperature.
with high grade fever may be viral or bacterial in origin. So also give antibiotics, zinc and probiotics after consulting your doctor.
Give him plenty of fluid and ORS to prevent dehydration
Avoid lactose containing milk based diet, juices,carbonated drinks. Give him cereal based semisolid diet.