My son is suffering from indigestion, he has not had anything for the past 2 days, his appetite seems to be very bad, also he has slight cold, my doctor has told he seems to have indigestion and probable infection and has suggested Zanocin syrup for him. However when I checked the leaflet which comes along with the medicine, it says that the medicine is for respiratory and urinary tract infections..is it fine to still go ahead and give him Zanocin?