My husband has had a chronic cough for about 15 years. He as taken hydrocodone syrup until about 5 years ago to calm the cough. Is there anything non narcotic that can be prescribed? he has gone through every test imaginable, thousands and thousands of dollars spent for a non diagnosis. He is healthy in every other way. He works outside as a general contractor and is in meetings daily...really needs help. some symptoms...not a dry cough. coughs up phlegm and sometimes a pea sized ball of hard phlegm. once the cough starts it can last 10 minutes or longer.