I went almost 2 years with ~70% pre rad saliva. It was low enough to where eating with a fluid was my only option. A friend took me to an Acupuncturist. I know, I know this stuff sounds hokey cause I was a skeptic. The nice lady hit 2 spots on my right ankle and foot and woosh - saliva. My saliva has maintained about 85 - 90% ever since, even through my second round of radiation. This only took one visit. I was able to eat without drinking until my throat closed down and stopped moving. I still have saliva to my doctors surprise. I wish your man the best with his recovery.