Please do not give Normet suspension without consulting your pediatrician. Normet contains antibiotics that are unnecessary and can be harmful if the diarrhea is viral, which is likely since your son is active and has no fever. Zinc does not stop diarrhea instantly; it works gradually to heal the gut lining and reduce the illness's duration. The most important step right now is preventing dehydration. Continue giving the Zinc suspension, and offer Oral Rehydration Salts (ORS) or coconut water after every loose stool. If he develops a fever, starts vomiting, or becomes lethargic, seek immediate medical care.