I feel the medicines prescribed are adequate. Try to give your son only warm fluids to drink; warm water, warm milk. Humidify the air by boiling water in a kettle and leaving it on in the corner of the room , while the child is asleep. Never leave the child unattended with the kettle on . Mix a teaspoon of honey and a pinch of pepper powder and give it to your soon. It might help reduce the cough
. As for food, give your son his favourite food, whatever he likes to eat.
In the presence of the following please take him to the paediatrician immediately:
more than 101 F, Persistent cough, fast breathing, grunting, drowsy, lethargic etc.
Hope your son feels better soon.
Dr. Divya Kuttikrishnan