The diagnosis is acute gastro-enteritis. You are giving the correct medicine for vomiting. You can treat the loose motion with a combination of probiotics and zinc. Even if the symptoms persist after this, then you may have to start antibiotics. Make sure that your child is having enough liquids.You have to also start ORS.
Next Steps
Visit your paediatrician, first and formost to check whether there are any signs of dehydration. Also to get the correct dose of the above medications as per his weight.
Health Tips
1) Keep a watch on the urine output..2) Give him plenty of liquids and ORS... Take care.