I have been to the doctor several times over coughing, taken bunches of medicine, when the medicine runs out I cough again. I have sinus drainage, allergies (for which I have had two years of shots), my nose isn't clogged and I do not have sinus headaches, occasional sinus pressure, nothing bad. The past several winters I get a "viral infection" and I cough, mostly at night, I get this a couple of times a year, late fall and mid spring. medicines did help, but in the last year, it has become more serious in that to not cough I have to take mucinex regularly. My breathing is fine, my coughing, I think is to clear my throat of mucus build up, and at night my nose and sinus' drain more actively. Any sluggestions would help.