HI Well come to HCM I really appreciate your concern, it must be smokers cough, first thing you need to do is quit smoking, second get done the x-ray of chest and routine blood examination it is just to rule out the infection, if care not being taken then it may developed in to COPDS (Chronic Obstructive pulmonary Disease), in my opinion better to see the chest physician for better treatment and advise and diagnosis, till then Tab Loratadine with Pseudoephedrine three times in day can be tried, if it is the infection detected then antibiotic may needed, if you are some inhaler then keep it continue, have more hot drinks, take care hope this information helps.