question: my son is 10 1/2 yr old .he has severe cough for last 2 weeks .he had also flu ,sre throat and lot of saliva is collected in his mouth with frequent intervals .I have given him augmentin DS 312mg along with britanyl syrup he has congestion in chest like bronchitis .he has no fever but cough & saliva problem is still there at night more.should i try aefyl syrup. he is going to school regular