i always use a "hot air" humidifier in the winter.
(my sister liked cold mist better, i like warm mist better so i guess thats a matter of choice)
i don't put any type of medication in mine, i just run it for the dryness in the house.
i'm not sure what you mean by "deep down cough" but i get choking because my cough is unproductive.
i (personal opinion) think the humidifier helps me by loosening the secretions---also i have found that keeping well hydrated helps loosen secretions so i develop a more productive cough.

I use a cool mist humidifier, and it seems to help me breath better and helps loosen anything that I need to cough up.

Be careful not to raise he humidity to much. because it can start mildew, unless you leave your door open a bit.

My daughter used a vaporizer for the baby for several days, in a closed bedroom, and later we found mildew, because it was a dark, closed off room, and yes, we knew better!!!

BRENDA

I had read awhile back when I was shopping for humidifiers that COPDers should have cold mist humidifiers. So that's what I have. I don't feel the mist so I assume I wouldn't directly know the difference whether warm or cold mist. My living room is comfortable year around - heat or ac with cool air mist..

A friend of mine who was recently hospitalized with pneumonia was told by his pulmonologist to use a cool mist humidifier at home.

I use cool mist humidifiers. Keeping the humidity level at a comfortable 40% not only helps my breathing, a recent research publication stated higher humidity (40%) inactivates cold and flu viruses.

http://www.sciencedaily.com/releases/2013/02/130227183456.htm

However, humidity that is too high is not good. It is important to keep humidifiers clean due to mold and mildew. In winter my house is too dry.

I prefer humidifiers without a filter. I use Safety First (tabletop) humidifiers. I got mine at Target.

Susan

Geo,

I do not use a vaporizer and haven't in years. When I lived up north we ran a humidifier constantly during the winter months. But now that I live in Florida, humidity has not been an issue, we have plenty. Also my doctor has never suggested it, but if he did, I would. Take care, Bill