Thanks for writing in to Healthcaremagic!
Such a small child should get treatment in the supervision of an expert pediatrician
, your selection of medicine is not safe for that age of child.
Mostly loose motions in the small children of that age are viral and antibiotics are misused,
Ensure the feed and hydration of the child with ORS
and control the fever
with tepid sponging.
The condition is mostly self limiting and would resolve in 4-5 days.
If you have any further query please let me know I would try to answer it for you.
Wish you a great health!