Thank you for your query,
You continue the medication as prescribed by your Pediatrician
Contnue frequent breastfeeding
and give sips of oral rehydrating solution like Pedialyte, ORS to prevent dehydration
Watch for his hydration status by lookind at his activity, urine output, moisture of the tongue and skin turgor.
The loose motions will take time to subside but you should maintain hydration in this duration.
and zinc can be added to his treatment aftre your doctor advise.
If child is dehydrated consult your Pediatrician.
Hope I have answered your query.