Thank you for your query on Healthcare Magic.
Usually in illness due to any infection, the appetite will decrease in children.
And once the infection has been treated and child is recovering from the illness, the appetite will increase.
Continue the medication as advised by your Pediatrician
You can give soft diet
and plenty of oral fluids during this period to maintain his hydration and nutrition.
Give balanced and nutritious diet containing frits, vegetables, and green leafy vegetables daily to improve his nutrition.
Vaccinate him appropriately as per the schedule.
Hope I have answered your query.