I am starting to give someone nebulized CS.  He has this nebulizer:
http://www.portablenebs.com/omronelite.htm

He does about 2 cc's, which takes about 10 minutes to nebulize.  How much
DMSO should I add to this much CS?  If the answer is in "percent", then
percent by what (ie volume...mass...etc)?  Any safety concerns?  I'm just
washing the nebulizer out with tap water between uses.

He's always coughed up mucus, which got a lot better after alt. treatment
for the cancer he has, a little of which touched his lungs.  But he still
has some mucus and coughing going on, and his voice has always been raspy.
I think he smoked ages ago.  He's done a lot of nebulized peroxide.  I don't
know what concentration, but a doctor gave that to us in bottles.  I suppose
you wouldn't want to do nebulized peroxide close to nebulized CS as a safety
thing also.

~David