I understand NeutraSal has distribution problems, and instead of this there is a similar product called, SalivaMax, same ingredients from what I see, which is supposed to work the same for dry mouth, mucocitus as NeutraSal, which I used with my last treatment, and found it helpful, convenient, and not off tasting as the salt water/baking soda rinse is, plus some studies said it worked better.
http://www.salivamax.com/