I have dry cough since 10 days, doctor gave me azithromycin for 5 days but no effect, combination of bromhexeine dexmethorphan syrup did not yield any sputum and cough didnt stop. The doctor gave montelukast and levocetirizine tablets for 10 days, I have been taking it since last 6 days but cough didnt subside yet, cough is not continous sometimes I am getting it, but when i get its continous for 2-3 mins, it doesnt disrupt my sleep though, what should I do, how can this be cured?