Cough with sputum. Relief and itching.

Suffering from cough for last 15 days. 15 days earlier swich CV 325 and viscodyn syrup was started for throat pain and cough. Swich CV 325 closed after 5 days. Now having viscodyn for last 10 days. But cough is not cured. There is  decrease in frequency of cough but it still continue. Now it's coming morning , evening and sometimes in afternoon. Yellow cough in small quantity coming out each time. As compared to last week this week its decreasing but not cure till now. Viscodyn still continues. In addition to above janumet 50/1000 twice and azulix once a day taking for diabetes. Diabetes remain in range of 100-150. Currently it is 150 pp bcz of sweets taken during Diwali. In addition to cough , body itching is there for last 5 days in some arms, back and thigh. Please suggest medicines for cough relief and itching.