The most common cause of loose stools in a kid less than 2 years is virus. So metrogyl
is not needed.
Metrogyl is given only for amoebic dysentry
Continue to give ORS
Be sure that he takes adequate fluids like ORS, water, vegetable soups etc.
Give him lot of curd as it contains probiotics naturally.
You may give him rice based food. Avoid fruit juices and formula milk as they may increase the frequency of loose stools. You can continue to breast feed if he is on breast milk.
At any time if you feel he is tired, drowsy, urine output is less or has dry skin
and mouth, refusing feeds please take him to your doctor immediately.
Hope you find my answer helpful.