As of physician please help me out, A male 26year old, smoker having cough dry mostly with little sputum , congestion, runny nose sometimes blocked , h/o of cough last 2month but little which sometimes releaves by own but recent exposure to Delhi pollution worsns it from few days , medicine taken cheston cold ,montail lc ,some how funny nose and sore resolves but cough and congestion doesn't resolved ,give me some medicine with Indian best brands and cause and investigation needed,and precautions