Re: Non stop cough and nasal drainage
You wife should ask her doctor for a good cough medicine. Hycodan worked well for me. It is a synthetic codiene cough med. Think it has another name now, but, the doctor will know.
Also, Halls cough drops work good too. Get the kind with Menthol.
I know you would rather find the cause, however, maybe one of the above might give some relief.
Another thought, does your wife have Whooping Cough? Did they test her for that? I am in my 70s and had whooping cough along with pneumonia last year. I had a bad case of whooping cough as a small child. Immunity does not last a life time. There are many cases of whooping cough these days.