I had a cold approximately 8 weeks ago. I did not have a 'productive' cough with it but I have had a dry cough that I cannot get rid of since then. I've been to my doctor and received over the counter allergy meds - Zrytec - told to rinse with saline. And 2nd trip given a saline shot. This had had no relief. I do not cough at night only when awake and it gets progressively worse thru the day.