Dear Sir my father is suffering from cough & cold for a fairly long time. the problem is that it results in constant coughing which lasts for months altogether. Last time he contracted cough it lasted for 2 months altogether. The problem is that even after taking medicine or antibiotics, coughing does not recedes. We are very disappointed. Should we consult a Pulmonologist for indepth check up or should we consult some other doctor. Every thing in the test appears to be normal. Please guide us.