Hello, I suffer from a non productive cough constantly. I have seen an allergist, a throat specialist, and a pulmonary specialist. No one seams to be able to help me. This cough is only getting worse - and louder. Seems like I have to cough hard to clear my throat. I am sure its nasal drainage, if I take Sudafed every 3 hours it helps, but I am not comfortable taking it so often. Do you have any ideas?