My son is 1.8 yrs old. Ge had cough and one day  fever from last 5 days. Dr adviced us to give moxyzen syrup (amoxicillin 125 mg per 5ml) 3 tine in a day with a cough syrup. He is improving well. But from last 2 to 3 says he had not eaten properly / enough as he had earlier as per his routine. Also stool is semi solid and then watery one time in a day. He had eaten less half as ge gad eaten earlier. We don't understand what to do in this situation. Please suggest any medicine or what process we do in future.