I was given NeutraSal samples at the Proton center, which is a prescription powder rinse you mix in 1oz of water, that helps with dry mouth and mucocitis, and everyday my mouth was sprayed by the nurse there, which helped with that, and thrush, which may occur with the mucocitis. In the past, I used Glutamine powder, and one is made by Abbott called Juven, which helps in tissue building, and taste like Gatorade, and aloe vera juice, the distilled type, helps in healing.
I hope this helps.